Package Contents: Includes 4 door opener remote transmitters compatible with LM123. Remote control frequency is 433.92MHz, with 4 independent channels. Made from high-grade materials with low power consumption technology, durable and reliable for everyday use. Compatible Models: Designed to work with Aleko, Lockmaster, Casar, and Topns automatic door openers. Specifically compatible with ALEKO automatic door opener systems. Tested over 100,000 cycles, ensuring long-lasting performance and strong signal strength. Strong Signal: Synchronizes quickly with the receiver within one minute. Suitable for various types of doors including garage doors, gates, and workshop doors. Offers a 170-foot signal range, allowing convenient operation without exiting your vehicle. Easy to Program: Simple pairing process using the buttons on the receiver. Provides a 170-foot signal range with strong signal penetration for reliable performance in diverse environments. Enhanced Security: Utilizes advanced 433.92MHz rolling code technology that generates a unique signal with each use, helping prevent unauthorized access by eliminating code duplication. Helps protect property by avoiding vulnerabilities associated with fixed code systems. Color: As shown in picture Material: Plastic Package Contents: 4 x Remote Control Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.