CMXZDCG440 Wireless Garage Door Opener Keypad Key benefits Secure, keyless access: Control your garage with a 4digit PIN instead of a remote or physical key. Flexible access control: Create temporary onetime pins for guests, delivery drivers, or service personnel. Visible and durable: Backlit keypad for night use and a waterproof flip cover to protect the keypad from moisture. What this product does Replaces your handheld remote or key by allowing PINbased entry. Works with Linear Megacode systems and a wide range of Craftsman keypads and part numbers (see compatibility). Compatibility Linear garage door openers: LD033, LD050, LS050, LC075, LDCO800, LSO50, LSO502T. Linear Mega Code receivers: MDR, MDRU, MDR2, MDRG, MDRM, MGR, MGR2, SMDRG. Replacement for Linear Megacode LPWKP / MDTK 318MHz keypad. Replacement for Craftsman models and part numbers: 977LM, 976LM, 90D, 956D, 377LM, 376LM, 940D, 66LM, 8500W, G940EVP2, Craftsman 139.3050, 139.53754, 139.5375401, 139.18795, 139.53684P, 139.53876, 139.53985D, 139.53919, 139.53684. Important note Not compatible with garage door openers that use DIP switch coding. Do not use with dipswitch type systems. Key features Model: CMXZDCG440 wireless keypad. PIN: 4digit code; temporary onetime PINs supported. Visibility: Backlit keys for nighttime operation. Protection: Waterproof flip cover for moisture resistance. Frequency/protocol: Compatible with Linear Megacode 318MHz systems and listed Craftsman replacements. Typical use scenarios Family entry: Family members enter and exit without carrying a remote or key—simply enter a stored 4digit PIN. Onetime access: Give a temporary PIN to a delivery person or service worker that expires after a single use. Replacement/upgrade: Swap in as a replacement keypad for compatible Linear and Craftsman models to restore keypad access or upgrade from a worn unit. Why customers choose this keypad Simple to program and use with supported Linear Megacode receivers and specified Craftsman part numbers. Provides secure, flexible access management without replacing the entire garage door opener. Built for everyday use with backlighting and a protective cover to ensure reliable operation in varying conditions. Technical/installation reminder Confirm your garage door opener uses a Linear Megacode receiver listed above or matches one of the Craftsman part numbers before . Not suitable for systems that use DIP switches; this keypad is designed for Megacodetype receivers.