Color: black, material: metal, size: 8.50 * 7.0 cm. This induction heating section uses low voltage DC power supply 12-48V. Maximum current 20A, maximum power 1000W. This circuit can not only be used for induction heating, the copper tube in the high-frequency transformer, is a powerful inverter. To increase the heat sink, a custom substrate with a thickness of 8.5mm is used! The cooling capacity is powerful. Tested 53V power supply at correct operation. Due to its moderate power, it can be used for small parts DIYers do hardening, annealing and other heat treatment, can also be used with a crucible when melting, silver, copper, aluminum and other metals. Heating even, convenient. Using the pillars, the fever is less, more efficient. Although this circuit can withstand an input current of 20-30A, but not exceeding 15A in safe operation, you can easily add an ammeter between the power supply and the heating plate but always monitor the current overload. Notes: The kit includes a set of control elements and brass. Buyers must bring their own power supply and cooling unit. The circuit board uses double-sided fiberglass board, mainly copper traces, used to expand. Use the entire back of the common resonant circuit, continuous work, add a fan to blow from above, for resonant capacitors and other components cool. The use of power supply Note that due to the high power, it is generally the slow start function, which is to open the machine's output voltage slowly increases, while turning on the induction heating circuit if the voltage rises to 12V, because the insufficient starting voltage can not afford vibrations, resulting in two components burning. So the first will start to turn off the power supply voltage reaches 12V above, and then access the induction heating circuit. The volume of the heated object inside the heating coil should not exceed 1/5 of the volume (if the heating cylinder, then the diameter of the heating coil is less than the diameter of 1/3), or it may be due to overload or exhaustion of the circuit's power supply. Package contents: 1 x module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.