rf remote duplicator for garage door starter (self-learning remote key ) Work on home alarm,garage door,car,etc. To prevent lost and replace ... 1. Copy most of rf fixed code remote ,such as garage door starter ,sliding gate remote ,automatic door remote ,home alarm and so on .Available ... ,SMC918-3SMC918-4, HT680 etc .2.Self-learning remote key3. Learining face to face in seconds4. Battery included ...