and easy to install. Fine workmanship and perfect style. Specification: buttons color: Grey Rated voltage: 12V 23A Installation: wireless For: Such as electric telescopic door remote control, road gate remote control, alarm remote control and so on. Wireless transmission distance: 10-150 (m). (open space) Frequency: 40MHz, 40.685mhz Compatible Models: for 40.685MHz Grey buttons for 2/4 for 2/4 for 2/4 Special note: If your remote control is not listed please do not buy it. Even if your remote control is on 40.685 MHz, do not buy it. Material: ABS colour: black gray + gray Package Contents: 3 x Garage Door Remote Contro Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.