Package includes four door opener remote transmitters compatible with the Aleko LM123. Remote control frequency is 433.92MHz with four independent channels. Features low power technology and durable materials. Compatible with Aleko, Lockmaster, Casar and Topns automatic door openers. After extensive equipment testing, it offers strong signal strength and long-lasting durability. Synchronize with the receiver within one minute, suitable for garages, gates and workshops. The 170-foot signal range allows for convenient operation from your vehicle. Easily program the remote through the buttons on the receiver. Advanced 433.92MHz rolling code technology generates a different signal for each use to prevent theft or copying, protecting your property from traditional fixed code vulnerabilities. Color as shown. Material is plastic. Package Contents: 4 x Remote Control. Only the above package content is included. Other products are not included.