HW-521 Digital Time Delay 1 Way Relay Trigger Cycle Timer Delay Switch Circuit Board Timing Control Module Wide voltage power supply (6 ~ 30V) supports micro-USB 5.0V power supply, easy to use; The interface is clear and simple, powerful, easy to understand, meet almost all your needs; There is a key stop function (STOP key), with reverse polarity protection, reverse polarity does not burn; Increase the sleep mode, it enables, without any operation within 5 minutes, turn off the monitor automatically; any key to wake up; You can set a different OP, CL, LOP parameters, which are independent of each other, were saved; All setup parameters are saved automatically power down. Operating voltage: 6--30V support micro-USB 5.0V power supply The trigger source: high trigger (3.0V-24V) signal with no common ground system to improve anti-jamming capability of the system (also self-shorting common ground) Output capability: You can control the DC or AC within 30v 5A within 220v5A Quiescent Current: 20mA Operating Current: 50mA Timing range: 0.1 seconds -999 minutes continuously adjustable; with optocoupler isolation, enhanced anti-jamming capability, industrial grade circuit boards, set the parameters after power failure memory forever. Special Note: The relay outputs are passive contact, uncharged output to control a line-off role. Colour:blue Material: ABS Size:10 x 6 x 3cm Package Contents: 1 x Module Only the above package content, other products are not included. Note: Light shooting 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_