Dear Buyer: 1.These remote control is learning code type (study code type),but not copy type.It need to work with the 433mhz receiver or relay module. 2.Sometimes,the touch of buttons be pressed during transportation lead to the battery be run out of power .so dear buyer ,if you received the remote control cann't Lighting ,please replace the battery. build-in 2pcs 3V CR2016. 3.If you want the remote control match with your receiver module,they need in the same conditions:1.433mhz;2.EV1527learn Code. Specifications : Working voltage: DC6V (Including) Operating Current: ≤ 8mA Working frequency: 433.92MHz Modulation Mode: ASK (AM) The transmission power: ≤ 100mW Emission Distance: 50m in open space Color: as picture shown Size: 6.1*2.9*1.2cm Package include:1pc