Model: SMG-2024 Type of programming: Programming with the receiver Frequency: 433.92 MHz Code: Rolling Code Buttons: 4 Working Range: 30m - 100m (open space) Battery: Includes battery Security: Dynamic code provides a high level of security; non-copyable code Compatible models: C940 433.92MHz, C943 433.92MHz, C945 433.92MHz, CM128 433.92MHz, CM842 433.92MHz, CM844 433.92MHz, E940M 433.92MHz, E945M 433.92MHz, E950M 433.92MHz, 2.0Type 433.92MHz, TX2EV 433.92MHz, TX4EV 433.92MHz, TX2EVS 433.92MHz, TX4EVS 433.92MHz, TX2REV 433.92MHz, TX4REV 433.92MHz, TX4UNI 433.92MHz, TX4RUNI 433.92MHz, TX4UNIS 433.92MHz Color: Black Material: Plastic Note: Due to different production batches, there may be slight variations in product appearance and printed text, which do not affect functionality. Package Contents: 1 x Garage Door Remote Control (other items not included) Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement error allowed is +/- 1-3 cm.