Chamberlain/Liftmaster 971LM Security Plus 1 Button-Sears/Craftsman Compatible Description Directional visor clip included, 3V lithium battery included, Features Security+ rolling code technology, Compatible with LiftMaster 390MHz Security+ Garage Door Openers and Radio Controls with a Redish orange learn button on the motor head. Features: 390 MHz Liftmaster 971lm transmitter is compatible with orange or red learn codes Operating range: 100ft- authentic Liftmaster product- OEM Operates on a 3 volt lithium battery Frequency of operation: Rotating Transmitter: 1 - button, 390 MHz frequency, code rotating technology (security+) Product Details: Brand: LiftMaster Color: Black, Grey Style: Modern Item Weight: 0.06 Pounds Assembly Required: No Manufacturer: ‎LiftMaster Part Number: ‎971LM Item Weight: ‎0.96 ounces Product Dimensions: ‎4 x 2 x 0.05 inches Country of Origin: ‎USA Item model number: ‎971LM Is Discontinued By Manufacturer: ‎No Color: ‎Black, Grey Style: ‎Modern Power Source: ‎battery-powered Item Package Quantity: ‎1 Batteries Included?: ‎Yes Batteries Required?: ‎Yes Battery Cell Type: ‎Alkaline Date First Available: April 22, 2004