Note: The color of the item may vary slightly due to photography and your own computer Self-locking type: Output data to achieve the trigger flip state.Each self-locking independent of each other.For example: Press A button A Relay Work. Press A button again A Relay Off. 12V remote control switchesit is recommended over 500mA DC power supply. Application: for anti-theft alarm remote control electric windows signal control industrial control lifting equipment Electrical control circuit etc. Parameters: Operating Voltage: 12V Working frequency: 315MHZ Control Channel: 2 Channel Contact capacity: 10A/250VAC; 10A/30VDC Work status: Inching/Self-locking/Interlock Supporting remote control: 50 ~ 100m (Open Place) two-button remote control Encoding type: Learning code Default working mode: self-locking Battery: 12V 27A Remote control distance: 30 meters Size: 7x5x4cm/2.76x1.96x1.57inch Color: White Black Weight: 82g Note: due to the battery is embargoed in the air transport so the battery is not include in the package thanks for your understanding. Operating Instructions: 1. The Factory Default is Inching.Press and hold the button A the Receiver A (Relay A)turns on; Release the button A the Receiver A (Relay A) turns off. 2. Each transmitter and receiver have been finished linking and factory default mode has been set up. When you receive them you do not need to link again you just need to connect the wiring according to our wiring diagram layout Package includes: 1 x Transmitter (Battery is not included) 1 x Receiver 1 x Screwdriver 1 x Wire 1 x Cable