... 1.digital time delay relay 2.Thumb switch setting, easy operation 3.Dual line, 4 digit bright LED display; YOTO HK4 Series Digital Time Delay Relay ... counting function2.High accuracy, High anti-interference3.Dual delay output time, delay output time can be set freely4.With external reset, pause ... ,1s~99m59m,1m~99h59mIf you are interested in our time delay relay,pls do not be hesitate to contact with ...