Our Garage Door Remote Receiver Keypad is a secure wireless keyless entry system that opens or closes your garage door without the use of a remote or key. The system operates with a dedicated 4-digit code programmed directly into the unit. This garage door keypad features Security+ 2.0 rolling code technology to synchronize with your existing opener frequency, helping prevent radio wave interference. It has been strictly tested using professional testing equipment. The keypad supports 3 channels, allowing control of up to 3 separate garage door openers with one device. Compatible with garage door remotes from 1993 models equipped with purple, yellow, red, orange, and green learning buttons. Not compatible with 200.57933, 57943, 57953, Series 100, CR1150, 139.57943, or 139.57953 models. Keyless entry enables wireless installation and programming. Large backlit buttons allow for quick and easy access in low light. A protective cover helps shield against weather elements. Includes one-touch closing function for convenient operation. Backlit buttons provide easy input in the dark. Weather-resistant cover offers protection from rain splashes. Product Name: Garage Door Opener Keypad Item No.: 877MAX Frequency: 310/315/390 MHz Code Type: Rolling code Battery: Built-in 9V carbon battery Working Voltage: 3V Working Current: ≤12mA Transmission Distance: Up to 100 meters (in open area) Operation: Functions like a standard remote; must be paired with the main garage door opener unit Color: As shown Material: Plastic Package Contents: 1 x Remote Control Keypad 1 x Battery 2 x Screws/Nuts Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by ±1-3 cm.