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0℉ or ±2%
the power supply should have good heat dissipation space and environment
a micro USB connector
7V 4600mAh Li-polymer Rechargeable Battery:
Dust proves water jets prove (IP65)
2 Channel Relay Module Relay Board Arduino Relay Module With Optocoupler 1s 3a 3.7v Li-Ion Bms 0℉ or ±2%This product is a 2 channel relay module board with LED indicators, It can be controlled by microcontrollers such as Arduino, AVR, PIC, ARM any other microcontroller operating at 5V. Features: High quality double sided compact PCB Opto Isolated inputs, means your digital electronics is safe and noise free This relay module is 5V active low It is an 2 channel relay interface board, which can be controlled directly by a wide range of microcontrollers