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, ensuring durability and reliable performance. Compatible Models: Designed to work with Aleko, Lockmaster, Casar, Topns, and ALEKO automatic door openers. Durability: Tested over 100,000 cycles, offering strong signal strength and long-lasting use. Strong Signal: Synchronizes with the receiver within one minute. Suitable for various doors including garage doors, gates, and workshop doors. Provides a 170-foot signal range, allowing convenient operation without leaving your vehicle. Easy to Program: Simple pairing process using the buttons on the receiver. Offers 170 feet of signal range with strong signal penetration for reliable operation in different environments. Enhanced Security: Features advanced 433.92 MHz rolling code technology that generates a unique signal with each use, helping prevent unauthorized access, signal theft, or cloning. Helps protect property by avoiding vulnerabilities associated with fixed code systems. Color: As shown Material: Plastic Package Contents: 4 x Remote Control Note: Other items not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.