Marantec 433.92MHz Remote Control Key Fob. This fixed-code transmitter is designed for copying existing remotes for compatible Marantec garage door and gate openers. Condition: New. Origin: China. Working frequency: 433.92MHz. Encoding type: Self-copy. Code type: Fixed code. Buttons: 2 or 4. Rated voltage: CR2032 battery (included). Compatible with models including: Marantec Digital 302, 304, 313, 321, 323, 382, 384, 211, 212, 214, 221, 222, 224, 231, 232, D302, D304, D313, Comfort 220, Comfort 250, Comfort 252, Command 131. Please verify your original remote is on this compatibility list. Programming Instructions for Self-Copy: 1. Clear duplicator memory: Press and hold buttons A and B until LED flashes three times. Release button B (keep holding A), then press button B three times slowly until LED flashes. Release button A. 2. Copy code from original transmitter: Place duplicator next to original transmitter. Press and hold button A on the original transmitter, then press and hold button A on the duplicator until its LED flashes. Release both buttons. Repeat for other buttons. This duplicator can create backups for systems such as vehicle central locking, garage doors, electronic gates, home automation, car sunroofs, and alarms. Package includes: Remote control, battery, English manual.