This is a replacement remote control transmitter compatible with various Marantec garage door and gate openers. Condition: New. Origin: China. It operates on a 433.92MHz fixed code frequency. The unit is a self-copying duplicator designed to clone your existing Marantec remote. It typically features 2 or 4 buttons and is powered by an included CR2032 battery. Compatibility includes models such as Digital 302, 304, 313, Comfort 220, 250, 252, 270, AZ021, 64176, Command 131, and other listed variants. Please verify your original remote is on the compatibility list before purchase. Programming involves a two-step process to first clear the duplicator's memory and then copy the code from your original transmitter by holding the buttons in close proximity. This product can serve as a backup for vehicle central locking systems, garage doors, electronic gates, and other compatible devices. Package includes the remote control, battery, and an English manual.