This is a 8-Channel 5V Relay interface board, be able to control various appliances, and other equipments with large current.
It can be controlled directly by ESP8266
8 x High-current relay, AC 250V 10A ; DC 30V 10A
Optical coupling isolation
VCC system power, JD_VCC relay power, default 5V relay, just plug in jumper cap
Indication LED's for Relay output status
4 fixed screw holes, hole diameter: 3.1mm
Module size: 137 x 55 x 20mm