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, ensuring durability and reliable performance. Compatible Models: Compatible with Aleko, Lockmaster, Casar, and Topns automatic door openers, including ALEKO models. Tested for over 100,000 cycles, delivering strong signal strength and long-lasting durability. Strong Signal: Synchronizes with the receiver within one minute. Suitable for various doors such as 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 170 feet of signal range with strong signal penetration for reliable operation in diverse environments. Enhanced Security: Features advanced 433.92MHz rolling code technology that generates a unique signal with each use, preventing unauthorized copying or interception. Helps protect against security risks associated with fixed code systems and enhances access control safety. Color: As Shown Material: Plastic Package Contents: 4 x Remote Control