Easy to Program - All the TOPENS swing and sliding gate openers can be operated by the M12 remote. Fast pairing makes it simple to add the remote to your gate opener system using the programming button on the control board. The M12 remote will operate the third-party gate opener whose control board accepts “Normally Open Dry Contact” signal for push button, and connects with our ERM12 receiver (sold separately). The ERM12 can be powered by 9-24VDC from the control board or external power source. Safe to Use - TOPENS M12 remote control transmitter is a 4-button wireless controller and works with all the TOPENS gate openers. Simply press the button to enjoy instant access to your property. The advanced TOPENS security code technology keeps the gate opener system safe. Small & easy to take wherever you are. The remote transmitter is well built with a durable metal frame for long-lasting performance. Clever Design - M12 gate remote provides excellent operation range of 65 feet. One TOPENS gate opener can pair Max. 8 M12 remote controls on its own, and up to 250 with the ERM12 External Receiver (sold separately). Every time you press the remote control will make the gate operate between open-stop-close-stop-open. For slide gate opener, button B is designed to activate the midway mode. The 2 x 3V lithium button cell CR2025 batteries (incl.) last up to 1 year at 5-10 activations per day. Flexible Operation Mode - If there is no signal interruption, one M12 remote can operate countless gate openers simultaneously within the control range. Additionally, one M12 is allowed to control multiple gate operators separately: (1) four swing gate openers (2) one sliding gate motor and two swing gate openers (3) one sliding gate motor, and two more sliding gate motors by adding two ERM12 to each control board respectively, and program button C/D for regular operation without midway mode. Customer Service and Technical Support - All the TOPENS products come with a 12-month war-ranty against defects, a 30-day exchange & return and excellent tech support. Visit TOPENS website for the user manual, installation video, and personalized service. TOPENS is ready to offer professional solutions for any questions or assistance. Enjoy an easier and smarter life by ordering TOPENS products. One M12 remote control is allowed to separately control multiple gate operators:(1) Each button controls one swing gate opener.(2) Program button A with one slide gate motor, and button B for midway mode (opens the gate partially for quick passing through). Program button C and D respectively with the other two swing gate openers.(3) Button A for one slide gate motor (Button B as the midway mode), and two more slide gate motors by adding two ERM12 receivers to each control board respectively, and program button C / D for regular operation without midway mode.Kindly Note If you lose any one of the remote controls, please erase and reprogram the rest to have a new code for safety. For clear signal transmission, please do not put the control board in a metal box. It is NOT suggested to use the remote at signal towers, electrical substations and confined spaces. Some buildings or obstructions may affect the control range. To extend the control range, it is recommended to pull the antenna out of the control box, or add an ERM12 receiver (NOT incl.) to the control board. The LED on the remote indicates RF transmission. If the control range decreases greatly or the LED is off when pressing the button, the batteries need replacement. The M12 remote control is NOT waterproof.Specification:Power Input: 2 x 3V Lithium Cell CR2025 Battery (Incl.)Operating Current: ≤ 8mAFrequency: 433.92MHz, TOPENS Rolling CodeTransmission Power: ≤ 100mWModulation Mode: ASK (AM)Operation Range: 65 feet (20m)Working Temperature: 0°F to 120°F (-20℃~ +50℃)Dimension of the Remote Control Transmitter: 2.2 x 1.2 x 0.4” (55 x 30 x 10 mm)Packing List:2 x Remote Control Transmitter with Batteries1 x TOPENS User Manual