Note: Dear customer, theblueandblackremote controls currently in the link are shipped randomly. If you mind the color, please contact the seller in advance. Thank you for your understanding and support. The default voltage of the remote controlis the adaptive voltage, As long as it is plugged in, it will recognize automatically. if you need to change the voltage, you need to buy a matching monitor. Wire Harne :The two black lines are 2.1m and the redline is 2.7m. (NotsuitableforWebasto,MostEberspacheriuitable.) Specification: Condition: New Material: Plastic Color: Black Whether battery is included: No (Need to buy 2 seions 7th battery) Fitment: For Diesel Air Heater Two-way remote control instructions: 1.Remote pairing operation: 1). First put the receiving parts that need to be paired into the waiting pairing state. 2). Then pre and hold the key on the remote control and confirm the build at the same time, the remote control appears waiting for pairing interface. 3). The remote control and switch enter the automatic pairing proce. After the code is succefully matched, it will automatically exit the code pairing interface and display normal working parameters. 4). If the code fails, it will not enter the normal display working parameter state. If the remote control code is not received after timeout, it will automatically exit the code matching state. 2.Temperature control mode switching: When selecting the temperature control method by remote control, you only need to pre the up and down keys at the same time to switch to the automatic temperature control and display the temperature. If the temperature is manually controlled, the oil quantity is displayed. 3.Adjustment of working status: The working state of the heater can be adjusted by remote control at any time. Methods as below: 1). Up adjustment key: increase the pump oil volume (manual temperature control mode), or increase the set temperature to increase the output temperature of the heater. 2). Down key: reduce the amount of pump oil (manual temperature control mode), or reduce the set temperature to reduce the output temperature of the heater. Two-way remote receiver description: 1.ON/OFF KEY: Long pre on/off: 1).There is light under the switch key. If it is on, it means that it is on, and if it blinks, it means that there is a fault. 2).Startup: When the working voltage meets the conditions, pre and hold the on / off button. 2.Manual fueling: In the off state, pre the on / off key 5 times continuously and quickly to start the manual pump oil. When all the air in the oil circuit is exhausted, pre the ON / OFF button to stop the pump. This proce requires someone to observe, to avoid exceive fuel entering the machine and causing black smoke at startup. 3.Remote pairing: In the power-on state, pre the on / off key 5 times in quick succeion, the indicator light flashes, and enter the remote control pairing waiting state. At the same time, pre and hold the power button + set button on the remote control to start remote control pairing. Wait for the auto-complete pairing to exit. ourmotherboardcanbeusedwithboth12Vand24V.Suitablefor3KW5KW8KW(8KWisonlysuitableforheatersmadeinChina)NotsuitableforWebasto,MostEberspacheriuitable.