4 Channel USB for relay Board for Controlling High Voltage AC and DC Loads

Set of 4 PAM8403 Audio Boards USB 5V Powered Dual Channel 3W Digital PCB

Compact 4 Channel USB for relay 71.6mm x 65.3mm for Embedded Automation

Optocoupler Isolated 5V 1-Channel Relay 2PCS Set for Industrial Control Systems

TDA2030A 18W Single Channel Audio 4 Pack DC Powered 6V to 12V Range

Practical Connector for Solar Panel Rails Secure and Stable Integration

2pcs 4-Channel DC MOSFET for For Pwm Control 3.2V-27V 10A Circuit Board