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ABS 18650 Power Bank Cases 1X 2X 3X 4X 18650 Battery Holder Storage Box Case 1 2 3 4 Slot Batteries Container

Speaker 0.5watt 8ohm + Power Amplifier Music Player Module
Size: 34 x 21mm
Fixed hole: 3mm
Pitch: 15mm
Speaker power: 0.5W / 8Ω
Speaker diameter: 50mm
Amplifier chip: LM386
Voltage: 5V

SIM900A V3.8.2 Wireless Extension Module GSM GPRS Board with Antenna Kit
- Onboard two sets of power interface VCC5 5V power supply, VCC4 interface, 4.8-5.2V power supply, optional power supply self-start (default) and control start.- Onboard SMA (default) and IPXmini antenna interface, SIM900A interface retains reset.- The size of the module is 49 * 50mm, all new and original equipment.- The computer can power the early computer debugging USB module, and there is a very large amount of data under the recommended current of more than 1A.- You can set up dozens of MA data in standby to provide 10MA low power sleep and sleep.

DC 12V Mini Submersible Water Pump 240L/H 63 Gallon Pump    VOLTAGE--DC12V/5W （AC is forbiden, Red wire "+" Black wire "-"）    Overvoltage Protection-If the voltage over DC12+1.5V, the water pump will power off.    Specification-Max Flow: 240L/H (63 Gallon); H-Max (Lift height): 0-3m    No Self-priming function-It must be completely immersed in water when using.    Detachable & Cleanable-Use only in clean water, not corrosive liquids. Can be disassemble if you need.

SG90 9G Micro Servo Motor Kit for RC Robot Arm Helicopter Airplane Remote Control

CH340 Serial Port Debugger USB to TTL Converter CH340G module STC Download Cable Adapter Module

5V Relay 1 Channel SSR Low Level Solid State Relay Module 250V 2A

1 Channel 5V Relay Module Low level Trigger    1-Channel relay module, with photoelectric isolation    dc or ac signal control, can control 220 v ac load    5v relay, low level trigger

Display 0.96 Inch Yellow Blue I2C Serial Self-Luminous Display Board
128x64 Resolution

Arduino Nano V3.0 Microcontroller Board with CH340 Type C USB Driver, 16Mhz ATmega328P

Arduino UNO ATmega328P with USB Cable for Arduino - Compatible With Arduino IDE

MQ7 Gas Sensor For Carbon Monoxide CO Detects