This wireless relay switch is a simple way to turn on your low voltage load. Suitable for security alarm, remote control electric doors and windows, signal control and etc. Easy to install and use. Features This kit includes 10 set of transmitters and receivers. You can turn on/off the receiver with transmitter (remote control) from any place within a reliable distance. Save you from messy wiring and time consuming work. It control circuit off, replace the key switch output is normally open and normally closed contact switch. Wireless RF signal can pass through walls, floors, doors or windows. You can use two or more units in the same place. Wireless control, easy to install. Compact design, suitable for any 3.7V/4.5V/5V/6V/9V/12V devices or lights. Specifications Working Voltage DC3.5V-DC12V Wide Range Working Voltage DC3.7V 4.5V 5V 6V 9V 12V Max. Load 1A (have better load less than 700mA) Quiescent Current 5mA Relay Working Current 20-30mA Working Mode Momentary, Toggle, Latched adjustable (315MHz); Momentary, Latched adjustable (433MHz) Product Size25 x 11 x 8mm Package Contents 10 x Receivers(Without Cover), 10 x Transmitter