Package Contents: Includes 4 door opener remote transmitters compatible with LM123. Remote control frequency is 433.92 MHz, with 4 channels. Made of high-grade materials with low power consumption technology, fully meeting your needs. Compatible Models: Compatible with Topns automatic door openers. Tested over 100,000 cycles, ensuring strong signal strength and long-lasting durability. Strong Signal: Can synchronize with the receiver within one minute, suitable for various doors such as garages, gates, and workshops. 170-foot signal range allows you to open the garage door or gate without leaving your car, offering added convenience. Easy to Program: Quickly pair with the system using buttons on the receiver. Enjoy a 170-foot signal range and strong signal penetration for reliable operation in any environment. Strong Security: Advanced 433.92 MHz rolling code technology generates a unique signal for each use, preventing signal theft or duplication. Protects against traditional fixed code vulnerabilities and ensures secure access control. Color: As shown Material: Plastic Package Contents: 4 x Remote Control Note: Only the items listed above are included. Other products are not included. Light reflection and differences in display settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.