IMPORTANT - Ensure your garage door opener has a red or orange learn button, as this remote is not compatible with other models. Compatible with garage door openers made between 1997 and 2005 that use 390 MHz security technology and feature a red or orange learn button. Supported opener brands include Sears, AccessMaster, and Master-Mechanic. Compatible remote models include 970LM, 971LM, 972LM, 973LM, 974LM, 91LM, 92LM, 94LM, 96LM, 950CB, 953CB, 956CB, 139.53680, 139.53681. This remote is not compatible with Genie, Linear, Overhead Door, or openers with dip switches. TRUE 4-button aftermarket remote compatible with up to 4 different 390 MHz garage door openers. Features a sliding cover to prevent accidental activation in pockets or bags. Built-in LED indicator shows transmission and low battery status. Utilizes advanced RF technology for improved range and secure rolling code encryption. Compact, keychain-style design for easy portability. Includes easy-to-follow programming instructions and a CR2032 3V lithium battery. Typical battery life is up to 2 years under normal use. Color: Black Material: Metal and plastic Size: Approximately 35.8 x 15.4 x 64.7 mm Package Contents: 2 x Remote Keys Note: The package includes only the items listed. Lighting and display settings may cause slight color variations in images. Measurement may vary by +/- 1-3 cm.