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. Specifically compatible with ALEKO automatic door openers. After more than 100,000 cycles of equipment testing, it delivers strong signal strength 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. The 170-foot signal range allows you to open the garage door or gate without leaving your vehicle, 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. Enhanced Security: Advanced 433.92 MHz rolling code technology generates a unique signal with each use, helping prevent unauthorized access by eliminating risks associated with fixed codes. Helps protect your property and ensures secure user access control. 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 error allowance is +/- 1-3 cm.