This is a dual channel transmitter that activates after entering a valid combination. Designed for indoor or outdoor installation, it provides high security with a rolling code that changes with each transmission. Estimated transmission range is 200 meters in open space and 35 meters indoors. The unit supports approximately 2 years of battery life with 10 transmissions per day. Operating voltage: 6 Volt DC. Includes 2 pcs 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 includes: 1 x Keypad, 1 x English Manual. Only the items listed are included; other products are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.