Number of channels: 1/4 Battery: 12V 23A Installation: wireless Wireless transmission distance: 50-150m (open space) Frequency: 40.685MHz Compatible with MAHS40 40.685MHz and MAHS40-01 models only Purchase Tips: Check the frequency on the back of the remote control; it must be 40.685MHz Check the button color, which is red Check the model number of the remote control, which is MAHS40-01 Programming Instructions: The transmitter and receiver must be coded to match Remove the battery cover by sliding it in the direction of the keyring tab Set the dip switch positions to match your existing remote control or receiver Note: Installation guide not included; professional installation is recommended Please verify all specifications to ensure compatibility Product may vary slightly between batches; minor differences in appearance or color may occur, but do not affect functionality Color: as shown in photo Material: plastic Package Contents: 1 x Garage Door Remote Control Only the above package content; other items not included Note: Lighting and display settings may cause slight color variations between the image and actual item Measurement error allowance: +/- 1-3cm