With ASK Technology Good Performance of Stability Attractive Appearance Easy to learn or duplicate Specification: TO prevent lost and replace your old remotes! 1. Self learning remote control 2. Use for car alarms, home alarms, garage door etc 3. Learining face to face in seconds Encoder models: Can copy most of remote controls in the market Frequency: Customized(315M, 330M, 390M, 433M, 433.92M(Hz), etc. ) Battery model: 27A Voltage: 12 v Product size: 49*23*5mm Button: 4