Installation: wireless Frequency: 432.92MHz Code: Rolling code Battery: 12V 27A Radio transmission distance: 30-100m (Open area) Scope of application: garage door, alarm, automatic door, rolling door, etc. Compatible Model: for Alutech AT-4, AN-Motors AT-4, Alutech AnMotors ASG1000, Alutech AnMotors AR-1-500, Alutech AT-4 600 Programming transmitters to receiver: The remote control has the same function as your old remote. It should be programmed with the old receiver according to your old manual. Color: Black + Silver Material: ABS Package Contents: 2 x Remote Control Note: Only the above package content is included; other products are not included. Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3cm.