Metal Wireless Keypad Door Opener Keypad Rolling Code 433MHz for Garage Door Access Control This is a dual-channel transmitter activated only after entering a valid combination. The unit is designed for indoor or outdoor installation, providing high security as the transmitted code changes with each transmission. Estimated transmission range is 200 meters in open space and 35 meters indoors. The device is designed for long battery life, estimated at 2 years based on 10 transmissions per day. Power: 6V DC 2 x CR2032 Li battery Battery life: 2 years (4 operations per day) Frequency: 433.92 MHz +/- 75 kHz Transmitter power: 1 mW Data format: standard Operating temperature: -20°C to +55°C Password digits: 0-8 Waterproof rating: IP54 Material: Plastic + Metal Color: Black + Gray Package Contents: 1 x Keypad 1 x English Manual Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.