Usage Tips:Tamper-proof Housing - The secure cast housing protect it from all forms of damage, including water leakage and rough contact. Weatherproof - Rated to IP54, making it virtually indestructible. Single Channel - Operate any Smart Openers garage door and gate opener or pair it with the Smart Receiver. Voltage: 12/24V (Compatible with 24V Operators). 1. Supply voltage: DC/AC 12V or 24V. 2. Output channels: 1/2/3/4 channels receivers are available 3. Capacity: Can pair up transmitters Max. 500 pcs 4. Relay work output impulse 5. Application: Automatic doors, such as residential garage doors/roller shutters/swing gates and sliding gates. 6. Conditions: The control unit of automatic device must have connectors for wall switches and 12V/24V power supply. The Receiver can be wired to the most available garage door motors as well as most driveway Gate motors that operate under 12V or 24V. It is simple to install and has a large receiving range of up to 50 meters from the remote control, also this receiver is capable of storing up to 500 remote control transmitters with a rolling code technology. The receiver will change the transmitting code each time it is used and with up to 1.2 Billion code combinations. It has to be one of the world's safest unit around for your security and your peace of mind! The wireless wall mount (two channel transmitter) and the handheld remotes (four channel) allow multiple units to be paired to the one control. Colour:Black Material:Plastic Package Contents: 2 x Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.