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1. Accuracy: 1.5dB (based on standard sound source, 94dB@1KHz)2. Frequency range: 31.5Hz-8.5KHz3. Dynamic range: 3.50dB4. Measuring range: 30-130dB5. Digital display: 4 digits, resolution 0.1dB, sampling rate 2 times/second6. Dynamic scale display: 1 scale represents 2dB, sampling rate is 2 times/second7. Dynamic scale range: 30-130dB8. Overload indication: "OVER" and "UNDER" symbols indicate9. Dynamic characteristics: two reaction speeds: FAST (fast) and SLOW (slow)10. Microphone: 6mm condenser microphone11. Battery: 600Mah/3.7V lithium battery12. Dual mode switching, sensitivity adjustable13. 0.6mm high-precision sensor, accurate capture, immediate response 6cm sound guide tube & silicone pad sound insulation and waterproof pad, enhanced performance14. Built-in 600Mah lithium battery, Typc-C charging head interface15. VA color screen, ultra-clear backlight, clear readings, with alarm indicator light16. Prompt when the upper/lower limit is exceeded. The upper and lower alarm limits can be set separately.17. Windshield design blocks all interference and is accurate.18. Anti-slip silicone buttons, skin-friendly, rebound and comfortable to the touch19. ABS shell, anti-fall and durable20. Dimensions: 190x61x31mmSpecification: Package Weight One Package Weight 0.33kgs / 0.74lb One Package Size 22cm * 10cm * 5cm / 8.66inch * 3.94inch * 1.97inch Qty per Carton 36 Carton Weight 12.98kgs / 28.62lb Carton Size 46cm * 32cm * 32cm / 18.11inch * 12.6inch * 12.6inch Loading Container 20GP: 566 cartons * 36 pcs = 20376 pcs40HQ: 1314 cartons * 36 pcs = 47304 pcs

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1. Wavelength: 395nm 2. Easy to use, just rotate and screw with the front of the lens 3. Scope of application: suitable for HCB0991 digital microscope with standard L10 lens and telephoto L100 lens 4. Good quality and long service life 5. Note: This product needs to be used with HCB0991 products, other products cannot be usedSpecification: Package Weight One Package Weight 0.24kgs / 0.53lb One Package Size 18cm * 10cm * 4cm / 7.09inch * 3.94inch * 1.57inch Qty per Carton 80 Carton Weight 20.30kgs / 44.75lb Carton Size 36cm * 40cm * 40cm / 14.17inch * 15.75inch * 15.75inch Loading Container 20GP: 462 cartons * 80 pcs = 36960 pcs40HQ: 1074 cartons * 80 pcs = 85920 pcs

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1. Produced with precision components, low power consumption, no switch, can work after plugging in the power supply, with colorful breathing lights2. Acting on the space environment, it can relax peoples body and mind, improve the body perception of sound and images, improve human health, work efficiency, and mental stress.3. It can be placed on the table or bookshelf 1.5 meters above the ground in the bedroom4. All-around design, no dust accumulation will affect the circuit5. Front and back double-sided transmitting antennas6. Input voltage: DC12V7. Current: above 0.5A8. Material: PCBSpecification: Package Weight One Package Weight 0.17kgs / 0.38lb One Package Size 12cm * 10cm * 1.5cm / 4.72inch * 3.94inch * 0.59inch Qty per Carton 194 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 194 pcs = 34338 pcs40HQ: 412 cartons * 194 pcs = 79928 pcs

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DC 5V to DC 9V 12V USB Voltage Step Up Converter Cable with 1A Step-up Volt Transformer Power Regulator Line with for Fan, LED Light, Wireless Router, Speakers and More Devices 1. Safe and Reliable: Our voltage adapter provides your devices reliable protection from over-current, over voltage, overload or short circuit2. Switch: Our step-up regulator is designed with switch, you can choose the output 9V or 12V through it, 3 .USB step up converter: input voltage is DC 5V, output voltage is DC 9V or 12V, max output current is 1A (9V), 0.8A (12V)4. Application: the USB to 9V cable can be applied to power the router via power bank if power down; In addition, can also be applied to other device which is 5V power supply, such as small fan, desk lamp, solar panel, USB power pack, power adapter, etc.5. Convenient use: plug and play, you can still enjoy the network during power cuts; Design with small dimension, is very convenient to carry outFeatures:1. With voltage adjustment keys, you can easily adjust the voltage.2. Can meet routers with different connectors.Specification:1. Input Voltage: 5V2. Output Voltage: 9V / 12V3. Output Current: 1A max (9V), 0.8A max (12V)4. Interface Properties: USB hole convert to DC round hole5. Length: 1 mPackage Includes:1. USB Step-up Converters x 12. Connectors x 8Specification: Package Weight One Package Weight 0.08kgs / 0.19lb One Package Size 15cm * 10cm * 3cm / 5.91inch * 3.94inch * 1.18inch Qty per Carton 100 Carton Weight 9.00kgs / 19.84lb Carton Size 52cm * 32cm * 32cm / 20.47inch * 12.6inch * 12.6inch Loading Container 20GP: 500 cartons * 100 pcs = 50000 pcs40HQ: 1162 cartons * 100 pcs = 116200 pcs

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1. Material: ABS2. Convenient design of lanyard to improve efficiency3. Comes with matching leather case, easy to take and take when testing, easy to carry4. Convenient holster helps secure this detector to any standard size belt5. Equipped with sensitivity adjustment button, suitable for different detection needs6. Long press the power button to switch alarm modes: sound, vibration, sound + vibration7. Using 9V battery, long-lasting battery life without frequent battery replacement (battery not included)8. Weight: 175g9. Overall dimensions: 255x40x15mmPacking list:- Metal positioning rod x 1- Anti-lost spring rope x 1- Leather case x 1- English manual x 1Specification: Package Weight One Package Weight 0.25kgs / 0.56lb One Package Size 28cm * 6cm * 6cm / 11.02inch * 2.36inch * 2.36inch Qty per Carton 30 Carton Weight 8.60kgs / 18.96lb Carton Size 30cm * 38cm * 32cm / 11.81inch * 14.96inch * 12.6inch Loading Container 20GP: 730 cartons * 30 pcs = 21900 pcs40HQ: 1696 cartons * 30 pcs = 50880 pcs

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1. Equipped with the high-performance Xtensa 32-bit LX7 dual-core processor of ESP32-S3R8, with a main frequency of up to 240 MHz2. Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE), with built-in antenna3. Equipped with 512KB of SRAM and 384KB of ROM, and stacked 8MB PSRAM and externally connected 16MB Flash4. Uses Type-C interface, eliminating the need to worry about the front or back insertion, improving the users convenience and device compatibility5. Equipped with a 1.54-inch LCD screen, 240 x 240 resolution, 262K color, capable of clearly displaying color images6. Equipped with ES7210 audio encoding chip, supporting dual-microphone audio acquisition and echo cancellation function7. Equipped with ES8311 audio codec chip, NS4150B power amplifier chip, microphone and speaker, enabling smooth gaming with Xiaozhi AI8. Equipped with QMI8658 six-axis inertial measurement unit (3-axis acceleration, 3-axis gyroscope), capable of detecting motion posture to expand applications9. Exposed I2C, UART and other pads, available for external devices and debugging use, flexible configuration of peripheral functions10. Equipped with 3 customizable function buttons, capable of achieving single-click, double-click, long press and other operations11. Equipped with 3.7V MX1.25 lithium battery charging and discharging interface12. Equipped with Micro SD card slot, enabling storage expansion, high-speed data transmission, improving flexibility of use, suitable for data recording and media playback, simplifying circuit designLCD screen parameters1. Display panel: IPS2. Display resolution: 240 x 240 pixels3. Display size: 1.54 inches4. Communication interface: 4-Wire SPI5. Touch type: capacitive sensing6. Display colors: 262K9. Driving IC: ST778910. Touch IC: CST81611. Effective screen size: about 2.772 x 2.772 cmSpecification: Package Weight One Package Weight 0.05kgs / 0.12lb One Package Size 10cm * 8cm * 5cm / 3.94inch * 3.15inch * 1.97inch Qty per Carton 126 Carton Weight 8.00kgs / 17.64lb Carton Size 50cm * 37cm * 32cm / 19.69inch * 14.57inch * 12.6inch Loading Container 20GP: 450 cartons * 126 pcs = 56700 pcs40HQ: 1045 cartons * 126 pcs = 131670 pcs

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1)) Professional for testing the DC parameters of manifold semiconductors such as diode, transistor, controlled silicon and field effect transistor 2) Measure capacitor, varistor, DC voltage signal source 3) Measure 78 and 79 three terminal voltage regulators 4) Data hold, low battery warning 5) Display: maximum reading 1,999 6) V (BR): 1000V / 200V 7) VCC (Set): 10mA(Ic)/100mA(Ic)/800mA(Ic)/2A(Ic) 8) 78, 79 three-pole constant voltage value: 78xx/79xx 9) Power supply: 4*AA battery (included) or DC 6V power supply (not included) 10) Comes with soft carrying pouch and English user manual 11) Dimensions: 14.9cm x 10.7cm x 6.9cm 12) Weight: 809gSpecification: Package Weight One Package Weight 0.85kgs / 1.87lb Qty per Carton 10 Carton Weight 8.37kgs / 18.45lb Carton Size 50cm * 35cm * 35cm / 19.69inch * 13.78inch * 13.78inch Loading Container 20GP: 435 cartons * 10 pcs = 4350 pcs40HQ: 1010 cartons * 10 pcs = 10100 pcs

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1. Material: ABS + electronic components2. Multiple: 20X-60X3. Power supply: built-in button battery4. Dimensions: 5 x 7 x 15 cm5. Mini body, compact and lightweight6. Comes with 5000K white LED light source, bright light source, easy to restore details and colors7. Adjustable multiple design, 20X-60X adjustable8. High-definition lens anti-dispersion coating, easy to observe the clear micro world9. Packing list: microscope, specimen box, specimen slide x 8Specification: Package Weight One Package Weight 0.23kgs / 0.52lb One Package Size 22.3cm * 6.3cm * 20.2cm / 8.78inch * 2.48inch * 7.95inch Qty per Carton 30 Carton Weight 8.40kgs / 18.52lb Carton Size 48cm * 44cm * 40cm / 18.9inch * 17.32inch * 15.75inch Loading Container 20GP: 315 cartons * 30 pcs = 9450 pcs40HQ: 732 cartons * 30 pcs = 21960 pcs

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Main Features: 1. Working current: DC 3.3V / 13 - 26mA 2. Idle current: DC 3.3V / 10 - 13mA 3. Sleep current: < 80uA 4. Peak current: < 30mA 5. Working frequency: 13.56MHz 6. Supports card: Mifare1 S50, mifare1 S70, mifare Ultralight, mifare Pro, mifare Desfare 7. Application: Various electronic products and DIY projectsSpecification: General Model RFID-RC522 Material Plastic Size 12*8.0*2.0 cm Weight 80 g Package Weight One Package Weight 0.09kgs / 0.19lb One Package Size 12cm * 8cm * 2cm / 4.72inch * 3.15inch * 0.79inch Qty per Carton 200 Carton Weight 18.40kgs / 40.56lb Carton Size 48cm * 40cm * 20cm / 18.9inch * 15.75inch * 7.87inch Loading Container 20GP: 694 cartons * 200 pcs = 138800 pcs40HQ: 1612 cartons * 200 pcs = 322400 pcs

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1. 1080P FHD can bring more light and dark details to the picture, the contrast and layering are improved, and the sharpness, brightness and color are significantly improved. 2. Full-featured Type-C interface, support for power supply, signal transmission. 3. It can rotate 0-90 degrees, which improves the portability of the product. 4. 10mm slim body, 4.8mm narrow border, not only can be placed on the bed to play games, watch movies, but also to travel, travel. 5. Non-slip, wear-resistant and dirt-resistant. Specification 1. Screen size: 14 inch 2. Resolution: 1920x1080P 3. Aspect Ratio: 16:9 4. Display Type: LCD 5. Panel type: IPS full view 6. Speaker: Dual Built-in Speakers 7. Product size: 324x209x5.2mm 8. 8. Product weight: 650gSpecification: Package Weight One Package Weight 1.80kgs / 3.96lb One Package Size 42cm * 28cm * 6cm / 16.54inch * 11.02inch * 2.36inch Qty per Carton 16 Carton Weight 28.00kgs / 61.73lb Carton Size 44cm * 50cm * 38cm / 17.32inch * 19.69inch * 14.96inch Loading Container 20GP: 318 cartons * 16 pcs = 5088 pcs40HQ: 740 cartons * 16 pcs = 11840 pcs

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1. USB: - USB 2.0 x 2 - USB 2.0 x 2 (via FFC connector) 2. GPIO: Raspberry Pi 40 PIN GPIO x 1 3. Header: M.2 slot x 1 4. HD media interface: HDMI x 2, 1x via FFC connector, support 4K 30fps output 5. DSI display: MIPI DSI x 1 (15pin 1.0mm FPC) 6. CSI camera: MIPI CSI-2 x 2 (15pin 1.0mm FPC) 7. Power input: 5V 8. FAN: 5V / 12V (no fan control) 9. RJ45 Ethernet: Gigabit Ethernet 10. CM4 slot: Suitable for all variants of Compute Module 4 11. SD card slot: MicroSD card socket for Compute Module 4 Lite (without eMMC) variants 12. Size: 85.0 x 56.0mmSpecification: Package Weight One Package Weight 0.07kgs / 0.16lb One Package Size 15cm * 12cm * 2cm / 5.91inch * 4.72inch * 0.79inch Qty per Carton 200 Carton Weight 12.60kgs / 27.78lb Carton Size 46cm * 32cm * 32cm / 18.11inch * 12.6inch * 12.6inch Loading Container 20GP: 566 cartons * 200 pcs = 113200 pcs40HQ: 1314 cartons * 200 pcs = 262800 pcs

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1. Output parameters: 4.2V2. Charging current: 40mA3. Compatible with various types of button rechargeable batteries, LIR2032, LIR1632, LIR2025, LIR2016, LIR2032H (high capacity)5. Mainstream charging interface, charging is simple and convenient6. High-efficiency core, convenient and efficient, stops when full, safe and reliable7. Intelligent charging, multiple automatic protections for overcharge, overcurrent and overvoltage8. Power cord length: 30 cm9. Size: 38x8x25mm10. Weight: about 30 gramsSpecification: Package Weight One Package Weight 0.04kgs / 0.10lb One Package Size 8cm * 7cm * 2cm / 3.15inch * 2.76inch * 0.79inch Qty per Carton 480 Carton Weight 20.30kgs / 44.75lb Carton Size 50cm * 37cm * 34cm / 19.69inch * 14.57inch * 13.39inch Loading Container 20GP: 423 cartons * 480 pcs = 203040 pcs40HQ: 984 cartons * 480 pcs = 472320 pcs

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