The operating voltage range is wide, 85-250 volts are available The static power consumption is low, 10 mA; the RC voltage drop is generally above 40 The high voltage is isolated, and the low voltage part not "hit" people It is , and its life span is generally several times longer than that of RC step-down. Hign-concerned Chemical:None Frequency:433 MHz Wireless Communication:RF Use:Lighting,Electric Door,Automated curtains,SWITCH Transmission Distance:500m Working voltage:AC 85-250V Standby current:10mA Working mode: Inching, interlocking, self-locking Maximum load: less than 3000 watts Size:60x50x18mm The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:ABS+mahogany Package Contents: 1 * controller module 1 * remote control Only the above package content, other products are not included. Note: Light reflection 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.