Wireless Remote Control Switch Relay Module and 500m Transmitter 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 will not "hit" people It is durable, 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 may vary 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.