ZVS 2000W High Voltage Induction Heater Module Flyback Driver Heating Board.Features: 1. Temperature protection: Heatsink temperature higher than 65 degrees C, enter protection. under 65 degrees C back to normal. 2. Undervoltage protection: Input voltage is less than 20V, enter protection. Input voltage up to 24V back to normal. 3. Power tube brokenshort circuit, display MOS-XX. 4. Only iron can be heated directly. Other metal materials need graphite crucible. 5. Copper pipe and water pipe con