This is a high-quality third-party replacement remote control compatible with various NOVOFERM garage door opener models. It operates on a 433.92MHz frequency using secure AES 128-bit rolling code technology for enhanced security. The remote comes pre-programmed with the old code; simply press and hold buttons 1 and 2 simultaneously to switch to the new 128-bit code. It is powered by an included CR2032 battery and offers a reliable transmission range of 25-50 meters in open spaces. Please note: access to your garage door opener's receiver is required for programming. **Compatibility:** This remote is compatible with NOVOFERM models including, but not limited to: Mini-Novotron 522, 524; Novotron 502, 504, 512; MCHS43-2, MTR43-2, MNHS433-02, MNHS433-04, MAX43-2, MAX43-4, MIX 43-2, and related "Design" variants. **Programming Instructions:** 1. Open the casing of your receiver unit, located near the motor. 2. Press and release the programming button on the receiver's circuit board (labeled ENR, MEMO, PROG, or REC). An LED will light up or blink. 3. Press and hold any button on the new remote for one second. 4. Release the button. The receiver's LED will turn off, indicating successful programming. **Package Includes:** - 1 x Remote Control - 1 x CR2032 Battery (pre-installed) - 1 x Keychain - 1 x English Instruction Manual