The use of military-grade 1.6MM double-sided glass fiber production. Using factory-customized large inductors, consistent parameters, and more stable performance (30MM large magnetic ring, using 1.2MM pure copper wire). All resistors use five-ring tight resistors (five ring precision resistors have small errors and work more stable) The over-current portion of the circuit board is entirely tin-added and can be used for induction heating. Generally, 12-30V DC power supply is used, and the current needs to be more than 10A, because the driver board is working in the state of zero voltage switching.