This is a dual channel transmitter that activates after entering the correct combination. Designed for indoor or outdoor installation, it provides high security with a rolling code that changes with each transmission. The estimated transmission range is 200 meters in open space and 35 meters indoors. Battery life is approximately 2 years based on 10 transmissions per day. Power: 6 Volt DC, 2 x CR2032 Li batteries 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 number: 0-8 Waterproof rating: IP54 Material: Plastic + Metal Color: Black + Gray Package Contents: 1 x Keypad 1 x English Manual Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the item and the image. Measurement may vary by +/- 1-3 cm.