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, Topns, and 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 be synchronized with the receiver within one minute. Suitable for various 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 car, offering greater 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. Helps protect your property from vulnerabilities associated with traditional fixed codes and enhances the security of your access control system. Color: As shown. Material: Plastic. Package Contents: 4 x Remote Control. Only the above package content is included; other products are not included. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.