Function: 1. The garage remote control has a built-in button battery, lower power consumption, ensuring long working time. 2. The garage remote is equipped with a metal buckle, elegant appearance and high durability. 3. The remote control switch has a and wireless remote control function, easy to use. 4. Maximum control distance up to 100 meters outdoors, low interference, high sensitivity. 5. The remote switch is a normal RF remote/transmitter, only works with the remote switch receiver. just copy them one by one. Specification: Item Type: Wireless Remote Control Switch Battery type: button battery (included) Battery Capacity: 120mAh Battery model: CR2016 Quantity: 4pcs Material: ABS and metal Input voltage: 12V Receiver sensitivity: andgt;97 dbm Transmission Distance: andgt; Approx. 100 m / 328.1 ft (open area) Decoding method: MCU software decoding Remote Storage: 20 Remote control type support: learning code EV1527 Operating Mode: Instant, Trigger, Latch Delay (5s, 10s, 15s) Output terminal: NO NC communication Wireless communication: radio Frequency: 433MHz Package List: 4 x remote key 1. Copy: Keep your original remote control in your left hand and our self-copy remote control in your right hand. Hold the two remotes as close to each other as possible (one-by-one learning is better) and press the top button A on both remotes at the same time. After a few seconds, the LED will blink twice, then slowly blink 3 times and finally it will stay on, indicating that this remote's key code has been learned by our self-copying remote.