Features Input voltage DC 5V~15V, this voltage range is the working voltage, not the voltage when the power supply is empty! (The voltage exceeds 15V or less than 5V, we do not guarantee it can work normally.) When heating by induction, usually work for 5 minutes to turn off the cooling. Since the current is relatively large during induction heating, the heat from the coil is also relatively large. This is a mini ZVS finished board without plug, excluding heating coil, transformer, cooling fan, etc. Make sure all components are soldered correctly, the positive and negative poles of the power cord are not reversed, after the load is connected (heating coil, transformer), then turn on! The maximum power is 150W (15V induction heating). Push the transformer 12V, the primary 5+5 turns, about 30W. Specification: Item Type: Induction Heating Panel Input voltage: DC5~15V. Maximum power: 150W (induction heating 15V) Package list: 1 x module1 x spool. Note: When using the battery and battery power supply, it must be ensured that the working voltage is more than 4.5V, otherwise, do not use battery or battery power supply! Do not use dry battery! The width of the heated object should be between 1/3 and 1/2 of the inner diameter of the heating coil, and the maximum should not exceed 2/3. For long-term use, it is recommended to use a copper tube as a coil and cool it with water. LED power indicator to indicate whether the card is powered. The reasons why the light is off can be: 1. The line is not connected and the power supply is not powered. 2. The board has damaged components. When the LED is off, the power supply should be insufficient and a larger power supply should be replaced. Package List 1 x Module 1 x Coil