★★★★★
Cheaper than the Liftmaster-branded version and works exactly the same. Bought two for my purple-button HD950.
Chamberlain
300MC Single-Button Garage Door Remote
Chamberlain's consumer-branded single-button Security+ remote. Identical hardware to the Liftmaster 371LM at a slightly lower price — pairs with any opener that has a purple learn button.
$16.95
● In stock — ships next business day
🛟 Free technical support
📄 Programming & FAQ
- ModelChamberlain 300MC
- Frequency315 MHz · billion-plus rolling codes
- CompatibilitySecurity+ openers (purple learn button)
- Battery3 V lithium · 5-year life
- FCC IDHBW1573
- Equivalent toLiftmaster 371LM, Sears 139.53879
In the box
- Chamberlain 300MC transmitter
- Directional visor clip
- 3 V lithium battery (installed)
- Programming card
Compatibility
Confirmed-compatible openers, receivers, and the older remotes this part replaces. If your model isn't listed, send us a photo and we'll verify before you buy.
Chamberlain openers
HD200
HD400
HD420
HD600
HD700
HD900
HD920
HD930
HD950
WD822KD
WD832KEV
PD212D
PD752KD
Liftmaster openers
3110
3220
3245
3255
3265
3280
3500
3575
3585
3595
Replaces these remotes
Chamberlain 950CB
953CB (1-button)
953D
956D
Liftmaster 371LM
372LM (1-button)
Same internal hardware as the 371LM in a Chamberlain-branded shell. If your opener has a purple learn button, this is the cheapest factory remote available.
Programming the 300MC
Same procedure as the 371LM: hit the learn button, hit the remote, done.
- Press the purple "learn" button on the side of the motor unit. The indicator light stays on for 30 seconds.
- Within 30 seconds, press and hold the button on the 300MC remote.
- Release when the motor light blinks twice. The remote is paired.
Each Security+ opener stores up to 8 remotes. Adding a 9th remote will erase the oldest one in memory.
What customers say
★★★★★
Range was better than my original remote. Recommended.