2 channel relay module 5V 2-channel relay modules 5VDC 2 road relay module control board with optocoupler male to male save energy

save energy

Function:VPN

Starting voltage is low

low effective

Memory of MAX & MIN measuring value

2 channel relay module 5V 2-channel relay modules 5VDC 2 road relay module control board with optocoupler male to male save energy2 channel relay module relay expansion board for arduino 5V low level triggered 2 way relay module Details: 1 Dimensions: 50. 5mm (length) * 38. 5mm (W) * 18. 5 (H) 2. PCB Color: Black 3 board four weeks with four screws holes, hole diameter 3. 1mm, easy to install and fixed 4 relay of high quality loose music relays SPDT. A common terminal, a normally open, one normally closed terminal 5 optocoupler isolation, good anti jamming 6 low pull, high