①. Versatile Compatibility: Designed to work with various types of garage doors and gate systems, serving as a solution for your access needs. ②. Easy Installation: The system is user-friendly, allowing for installation without the need for professional help. Enjoy the convenience of wireless control. ③. Wireless RF signal can pass through walls, floors, doors or windows. You can use two or more units in the same place. You can turn on/ off the receiver with the transmitter from any place within a reliable distance (Max range is up to 164ft/50m with no obstacle). ④. Buttons: 2 Buttons ⑤. Remote Distance: 20-50M ⑥. Working frequency: 433mhz ⑦. Encode: Fixed code/EV1527 code ⑧. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. ⑨. Colour: Black ⑩. Material: ABS ⑪. Package Contents: 4 * Remote Control Switch ⑫. Only the above package content, other products are not included. ⑬. 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.