Chamberlain WD822KD 1/2-HP Belt Garage Door Opener, The ultimate in quiet performance, features exclusive motor vibration isolation system (MVIS) which eliminates powerhead vibration for reduced noise, perfect for rooms above the garage. 1/2 HP heavy-duty motor offers steady performance and lifting power year after year. PosiLock theft protection assures that once the door is closed, it stays locked. 315mhz frequency, soft glow with 2 light lenses, comes with two 3 button remotes, keyless, entry pad, mfr.'s lifetime warranty.