Installation: Wireless. Frequency: 433.92 MHz. Code: Rolling. Battery: 12V 27Ah. Radio Transmission Distance: 30-100m (in open spaces). Applications: Garage door, alarm, automatic gate, roller door, etc. Compatible Models: Alutech AT-4, AN-Motors ASG1000, AR-1-500, AT-4 600. Transmitter to Receiver Programming: The remote control has the same functions as your previous remote control. It must be programmed with the previous receiver following the manual. Color: Black and Silver. Material: ABS. Package Contents: 2 Remote Controls. Only the listed package contents are included. Other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error margin is +/- 1-3cm.