1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Raspberry Pi 4 Model B (4GB Ram) Build custom 3D printers and

Build custom 3D printers and CNC machines at home

operating on VHF/UHF 144-148MHz / 420-450MHz

Compatible with all 3

and Li-Ion batteries with automatic chemistry detection and optimized charging profiles for each type

1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Raspberry Pi 4 Model B (4GB Ram) Build custom 3D printers and1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board 1 Channel Relay Board Module 5V Low Level Trigger Relay Expansion Board Product description: This module is in line with international safety standard, control areas and load area have the isolation groove. Have power and relay operation instructions, connect the light will on, disconnect the light will off. When signal input, the public end and often start conduction. Can be used