... colorPure whiteService lifefull-load (220v)of relay contact:>100 thousand times.Dimension86 * 86 mmRange of application&Functions and Features Intelligent insert card ... switch is installed on the wall beside the door of guestroom, when people come, insert the card for power, it ... and convenient to customer for night operation.2,Delay shutdown when people leave ,taking out the card, the main power ...