DC 12V Wireless RF Remote Universal Relay Receiver and Transmitter 4-Channel Remote Control 315/433Mhz for Garage DoorOOTDTY  Features: Easy operation.4 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. Widely application, can be used in homes, farms, factories, offices, laboratories, supermarkets and so on. Remote control garage door, electric door, house door, shutter door, expansion door, etc.Specifications: Material: ABSSize: Approx. 5.8x3 cm/2.28x1.18 inType: 315mhz/433mhzWorking Voltage: DC 12VRF frequency:315MHz/433MHzPackage Includes: 1 Set Remote Controlnote: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.