Package Contents: Includes 4 door opener remote transmitters compatible with LM123. Remote control frequency is 433.92 MHz, with 4 independent channels. Made of 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, including ALEKO models. Tested over 100,000 cycles for long-lasting durability and strong signal performance. 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 leaving your vehicle. Easy to Program: Simple pairing process using buttons on the receiver. Provides 170 feet of signal range with strong signal penetration for reliable performance 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 secure property by avoiding vulnerabilities associated with fixed codes. Color: As shown Material: Plastic Package Contents: 4 x Remote Control