1. Adopt relay, stable and reliable performance 2. Compatible with two input modes of positive control and negative control 3. Each channel has an LED action indicator to understand product performance more intuitively 4. Each channel adopts optocoupler isolation to enhance anti-dry resistance and isolation performance 5. Simultaneous power supply and ""IN"" control terminal control 6. The module adopts standard ""DIN"" rail type installation design, which is convenient and fast to install, firm and stable. Specification 1. Trigger signal: DC3.3V or 5V12 or 24V 2. Each trigger signal current: 5mA 3. Supply voltage: DC5V 4. Each coil current: 18.8mA 5. Contact type: one normally open and one normally closed (single pole) 6. Maximum load current of each contact: 10A 7. Action time: less than 12ms 8. Reset time: less than 4ms 9.Maximum switching frequency: 18000 times or hour 10. Mechanical life: more than 20 million times 11. Relay installation: plug-in (no) 12: Module installation DIN standard rail installation colour:Greenandblue Material:PCB size:6x6x3cm Package Contents: 1 x 5V 4 Channel Relay Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.