Package Contents: you will receive 2 packs universal garage door opener, built in instruction manual, key fob, built in battery, compatible with LiftMaster, Chamberlain, Craftsman brand bottle openers from 1993 to present, with purple, red/orange, ye, Special Design: slide protection, no more damage caused by accidental pressing into pocket or purse, built in LED emission and low battery light dimming reminder, small, compact and lightweight keychain style; Easy to carry, the latest RF technology, Safe and Reliable: can control 4 different garage door openers, door operators and accessories at the same time, Security+ 2.0 and rolling code technology, the highest level of encryption, keep you away from foreign intrusion and give you peace of mi, Easy to Program: you only need to follow the steps in the instruction manual and you can pair the remote with the garage door opener in minutes. Works with multi-frequency Security+2.0 310/315/390MHz etc. The working distance of the remote control is, Precautions for Use: please perform remote programming near the remote control of the garage door; Before starting the remote programming, make sure the garage door opener is completely closed, otherwise the programming may fail, please note that aft
