brand new and high quality Features: Mini ZVS induction heating plate and heater coil without cooling fan. High power 120W (when 12V induction heating). Push the ignition coil 12V, when the primary 10 turns, 30W or so. Input voltage for DC 5V~12V, this voltage range is the voltage when working, not the voltage when the power supply is no-load! (The seller does not ensure normal operation if the voltage exceeds 12V or is lower than 5V. If the input voltage is not within this range, the seller will not be responsible for any problems!) Confirm that all components are welded correctly, and the power cord is not reversed. After connecting the load (heating coil), then power on! No power on without load! No-load power on is easy to damage! The width of the heated object should be as far as possible between 1/3~1/2 of the inner diameter of the heating coil, not more than 2/3! The diameter of the heating object should be controlled within 20mm as much as possible. If it is too large, it will be more difficult to heat to redness. After all, the power is limited. In induction heating, the power is cut off for 5 minutes to cool. In induction heating, it is better to solder the heating coil directly to the PCB board. For long-term use, it is recommended to use copper tubes as coils and pass water for cooling. In induction heating, it is better to solder the heating coil directly to the PCB board. In the for case of induction heating, it should be powered off and cooled after 5 minutes of work. For long-term use, it is recommended to use copper tubes as coils and use water for cooling. Tips: The heating plate cannot be powered by batteries or storage batteries! Specifications: Materials: plastic + metal Input Voltage: for DC 5V~12V Power: 120W Color: As pictures shown Size: app.37x56mm/1.46x2.20in Quantity: 1set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Heating Board 1 x Heater Coil(other accessories demo in the picture is not included.)