Package Contents: Includes 4 door opener remote transmitters compatible with LM123. Remote control frequency is 433.92 MHz, with 4 independent channels. Made from high-grade materials with low power consumption technology, durable and fully meets your needs. Compatible Models: Compatible with Aleko, Lockmaster, Casar, and Topns automatic door openers, including ALEKO models. Tested over 100,000 cycles, ensuring strong signal performance and long-lasting durability. Strong Signal: Can synchronize with the receiver within one minute. Suitable for various types of doors such as garage doors, gates, and workshop doors. Offers a 170-foot signal range, allowing you to open doors without leaving your vehicle for 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. Enhanced Security: Features advanced 433.92 MHz rolling code technology that generates a unique signal with each use, helping prevent unauthorized access by reducing the risk of signal theft or duplication. Helps protect against vulnerabilities associated with fixed code systems and enhances security for access control. Color: As shown Material: Plastic Package Contents: 4 x Remote Control Note: Light reflection and differences in display settings may cause slight variations between the color of the item in the image and the actual product. Measurement allows an error of +/- 1-3 cm.