This wireless garage door keypad is compatible with Liftmaster garage door openers with purple yellow red orange green learn buttons from 1993 to present. Features: This garage door opener key pad is a secure keyless entry system that opens or closes your garage door without the use of a remote or key. The wireless keyless entry system opens your garage door using a 4-digit private code that you program directly into the device. The keyless entry system offers wireless installation and wireless programming. A rain cover is included. Large backlit buttons on the keypad provide quick and easy access. Offers a one-touch closing feature that makes closing the garage door easier than ever Features the latest Security+ 2.0 rolling code technology that easily synchronizes with existing door opener frequencies to eliminate radio wave interference. Compatible with 877MAX, 878MAX, 376LM, 377LM, 877LM, 977LM keypad. Yellow Learn Button Purple Learn Button (315 MHz Security +) Red Learn Button(390 Security +) Green Learn button (390 MHz Billion Code) Specification: Material: Plastic Color: Grey Battery Type: 1 x VAVTT 6F22/9V Battery(built-in) Size(LxWxH): 8.9 x 3.8 x 16.5 cm Package Content: 1 x Garage Door Opener Keypad 2 x Screws 2 x Expansion Tubes Please Note: Due to manual measurement, there might be a tolerance in the product size. Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance.