Installation: wireless Frequency: 433.92MHz 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 Only the above package content, 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 is +/- 1-3cm.