1. Wireless control: after you set up with remotes,you can control it wirelessly 2. Remote control: supports 150m in open space 3. Multi control: many remotes can control same receiver at the same time(at most 20pcs remotes) 4. Wide voltage: supports dc 12-72v 30a,can be used in many places Receiver parameter Size: 66 x 44 x 31mm Shell: yes Mode: momentary/toggle/latched Code: 1527 learning/2262 fixed Modulation: ASK Port: L and N Working temperature: -30-+80 celsius Remote parameter Size: 60 x 30 mm Battery: 2pcs CR2016(Include) Buttons: 2 Code: 1527 learning Item Type: Switches Switch Type: Remote Control Quiescent Current: less than 5mA RF frequency: 433MHz Receiving Sensitivity: more than 97dbm Application scenario: Family, Farm, Factory, Office, Supermarket Application2: Garage, Light, Automated curtains, Fan, Door, Gate, LED, Lamps, Motor color:Photo color Material:plastic Package Contents: 2 x Switch 4 x Remote control(150m) 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.