Estone New 1 Channel H/L Level Trigger Optocoupler Relay Module for Arduino 5V Only sold by Heroneo.Photo taken by Heroneo. 100% Brand new and high quality 1-Channel relay module, with photoelectric isolation The module can be high or low by a jumper setting trigger With power and relay action indicator The module uses genuine quality relay, normally open interfaces Maximum load: AC 250V/10A, DC 30V/10A