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 reliable for everyday use. Compatible Models: Compatible with Aleko, Lockmaster, Casar, and Topns automatic door openers. Tested over 100,000 cycles, ensuring strong signal performance and long-lasting durability. Strong Signal: Synchronizes with the receiver within one minute. Suitable for various door types including garage doors, gates, and workshop doors. Offers a 170-foot signal range for convenient operation without leaving your vehicle. Easy to Program: Simple setup using buttons on the receiver. Provides 170 feet of signal range with strong penetration for reliable performance in different environments. Enhanced Security: Utilizes advanced 433.92 MHz rolling code technology that generates a unique signal with each use, helping prevent unauthorized access, cloning, or interception. Helps protect property by avoiding vulnerabilities associated with fixed codes. Color: As shown 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.