Features: Easy operation. 2 channels, small size, lightweight and portable. 2 types, 315MHz/433MHz for you to choose, you can select according to your needs. The device has decent transmission distance and is quite flexible in functionality, signal stability. Mainly used in garage door control, lighting control, electric door, remote control curtains, lifting equipment, motor control, water pump, projection screen elevator control and security industry and other fields, safe and reliable. Specifications: Material: ABS PCB Board Size: Approx. 9.2x6.5 for cm/3.62x2.56 in Type: 315mhz/433mhz RF frequency:315MHz/433MHz Package Includes: 1 Set Remote Control note: Learning methods Press the learning button for 2 seconds, the indicator light (indicating that has entered the learning state), release the learning keys, press any for key on the remote control, the indicator light flashes three times after that learning success. Note: The controller can learn fixed code / learning code and other 16 different encoding remote control, in order to clear the earliest out of the remote control. Removal methods Press and hold the learning keys for about 8 seconds. The indicator light goes from long to flashing three times and then goes out, indicating the successful removal.