Features: 1. Liquid crystal display, easy to read. 2. Equipped with control button functions including manual refueling mode, timed start or stop, and time setting. 3. Parking heater controller is user-friendly and supports timed start or stop. Remote control pairing is quick and easy. 4. Special design: parking warm air knob controller with manual refueling mode, allowing the owner to quickly set via the knob. The product has been thoroughly tested before shipment to ensure reliable performance. 5. Wide application: 12V/24V power supply voltage parking heater controller, suitable for cars, trucks, and other vehicles. Product instructions: 1. Remote control pairing. 2. Refuel in manual mode. 3. Start or stop using timer function. 4. Set the operating time. 5. Remote control code description. 6. In the off setting state, press the first button and hold the Confirm button for more than 3 seconds. 7. Enter the remote control startup code interface; display shows HFA, then press the remote control code. 8. Code exits the code interface. The machine returns to standby state if code entry fails or times out. Specifications: Remote control power: 2 AAA batteries (not included) Voltage: 12 V / 24 V Material: ABS Color: Black + Red Package Contents: 1 x Remote Controller 1 x LCD Monitor Switch Note: Light reflection and different displays may cause slight color variation between the item in the picture and the actual product. Measurement error allowed is +/- 1-3 cm.