Adopts built-in 1527 working chip, fully compatible with receiving module with common learning code(1527) Chip, such as, PT1527, EV1527, etc. Compatible with the most of 1527 Remote Control Relay Receiver Module, If the remote control is lost, buy one and pair with the receiver is OK.) Adopts radio frequency technology and stable circuit, high accurate and high-effective, individuation and humanization design, bringing you much convenience. Strong RF signal, high-sensitive and omnidirectional, you can turn on/off the receiver by the 433MHz remote control (transmitter) from any place within a reliable distance (150m open area). (The wireless RF signal can pass through walls, floors and doors.). Easy to install and use, the 4 channel remote control system lets you take control of your gadgets, car and home or garage. Widely Use: It can connect to the electronic control lock, light, fan, window, curtain, motor, car, lifting appliance, motor control, lifter control or other appliances with DC12V. So that it can remote unlock the door, close the light, open or close the curtain, etc. Press and hold on button "A" , relay will turn on; Release the button, this relay will turn off. Same effect as other buttons. Support APP:No Channel:4 Wireless Communication:RF Working voltage:9-12V Working Current:less than equal 30mA Operating RF Frequency:433MHz Transmit power:Greater than 15mW Wireless Operating Distance:150m(Free Space) Frequency Deviation:±0.2MHz Transmission Rate:50 - 60KHz Coded System:1527 Learning Code Oscillation Resistance:340k Use:Lighting,Electric Door,Automated curtains,Curtain control,Garage door control,Projection curtain control Instructions: Seven functions: inching, self-locking, interlocking, 2-way inching + 2-way self-locking, 2-way inching + 2-way i