Universal Compatibility: Designed to work seamlessly with a wide range of models including for 104257 and 104251, ensuring a perfect match for your garage setup. Enhanced Range: Operates efficiently at 433Mhz frequency, providing reliable performance and extended range for convenient garage access. and Secure: Built with robust materials to withstand daily use and features advanced security technology to keep your garage access safe and secure. 1. Programming type: Programming with receiver 2. Number of channels: 4 3. Code: rolling code 4. Frequency: 433.92MHz 5.Woring range: 10-50 m (open space) Security of use: dynamic code provides a high level of security, non-copyable code. Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:Black Material:ABS Package Contents: 1 * Garage door remote Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.