We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Wireless garage door keypad with backlit buttons

878MAX/877LM garage door opener

SKU CH-W1M8-898SC MPN 878MAX/877LM

Wireless keypad opens garage doors with a four-digit PIN, works with LiftMaster, Chamberlain and Sears Craftsman units made since 1993 and runs on one 9 V battery

  • Weight0.15 kilograms
  • Horse PowerOver 3/4
  • Compliancehas_fcc_id, not_applicable, 2AQXW878MAX
  • PowerAlkaline
  • Universal compatibility with LiftMaster, Chamberlain and Sears Craftsman openers since 1993
  • Rolling code encryption generates a new wireless code after every use
  • Industrial-grade chip maintains stable operation in freezing temperatures
  • Backlit keypad provides 4-digit PIN entry and temporary codes for guests
  • Single 9V battery powers wireless operation with no wiring required

Universal Compatibility

This wireless keypad works with LiftMaster, Chamberlain and Sears Craftsman openers that have a Purple, Red, Orange, Yellow or Green learn button on units made since 1993. It replaces part numbers 377LM, 977LM, 66LM, 376LM, 877LM, 877MAX, 878MAX, 940EV-P2, 940ESTD and CMXZDCG440. The keypad does not support Security+ 3.0 white-button openers produced in 2026 or older dip-switch models.

Security And Access

Rolling code encryption generates a fresh wireless code after every use to protect the garage from code-grabbing attacks. A four-digit PIN removes the need for a handheld remote, while backlit buttons allow night operation and temporary PINs give secure guest access.

Cold-Weather Reliability

An industrial-grade chip is tested for stable operation in freezing temperatures without signal loss or extra battery drain. The unit runs on a single 9 V alkaline battery, so no wiring or professional installation is required. FCC certification and a three-year manufacturer warranty back the design.

Highlights

  • Universal compatibility with LiftMaster, Chamberlain and Sears Craftsman openers since 1993
  • Rolling code encryption generates a new wireless code after every use
  • Industrial-grade chip maintains stable operation in freezing temperatures
  • Backlit keypad provides 4-digit PIN entry and temporary codes for guests
  • Single 9V battery powers wireless operation with no wiring required

Specifications

Brandvtech
Model878MAX/877LM
Part Number878MAX
Weight0.15 kilograms
Horse PowerOver 3/4
Compliancehas_fcc_id, not_applicable, 2AQXW878MAX
PowerAlkaline

Questions about this item

How does the rolling-code encryption protect my garage once the keypad is installed?

The keypad generates a fresh wireless code after every use, so a captured signal cannot be replayed to open the door.

Which learn-button colours on my existing opener will let this keypad pair successfully?

It pairs with Purple, Red, Orange, Yellow or Green learn buttons on LiftMaster, Chamberlain or Sears Craftsman openers made since 1993; it will not work with Security+ 3.0 white buttons or dip-switch models.

What mounting hardware or wiring is required to attach the keypad outside the garage?

No wiring is needed — the unit runs on a single 9 V alkaline battery and mounts with screws (not included) for a quick DIY installation.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.