Features: * Remote control distance is 0-3000M (Ideal distance without any block and signal interfere, it would rise and fall about 10%-90% with the block and signal interference.) * 433MHz, strong power, bringing you a new experience of remote control and much convenience in your daily life. * It is only a common RF remote control(transmitter ). So it is only the professional can buy it alone or who buy our switch then need an additional transmitter. * Suitable for remote control switches, anti-theft alarm, remote control door locks, remote control electric shutter doors and windows, water pump remote control, industrial control products, etc. * Stable signal can pass through walls, floors, doors or windows.