Feature: 1. Wide Application: Widely used for short and long distance wireless switching devices, such as lifts, boats, electric curtains, roller blinds, garage door openers, cars, trucks, RVs, generators, electric door locks, windows, manual switch extenders, etc. 2. Easy Operation: Easy to install and program in minutes, easy to follow wireless programming allows setup in seconds and eliminates the need for electrical connections on the side of the garage opening. 3. Features: The 3 button switch is simple and easy to carry and can be carried in your pocket or you can clip it to your visor to control your garage door from your car. 4. Advantages: This garage door switch remote controller has stable performance, strong housing, lightweight, wear resistant and broken resistant. 5. Stable Performance: Long battery life, and withstand strict quality tests, high accuracy, stable characteristics, high reliability and practical. Specification: Item Type: Garage Door Wireless Button SwitchMaterial: ABSBattery Model: 12V23Ax1 (one battery for each remote control) (shipped with built in battery) Battery Capacity: 50mAH. Matched Frequency of Remote Control: 433Mhz Application: rolling door, garage door, telescopic door, electric curtain, etc . Package List: 3 x Garage Door Wireless Button Switchs