Input voltage DC 12V ~ 40V, maximum input current 50A (short circuit), recommended input voltage range DC 24V ~ 36V     The power supply used for heating must be large enough     Use protective power, do not use batteries or battery power     For long-term use, brass tubes with water must be used for cooling     This is mainly for heating          Note:     It is the working voltage, the input voltage when the coil is turned on or heated. It is not the no-load voltage. When 12V power supply, the current is not less than 20A; when 24V power supply, the current is not less than 30A; when 36V power supply, the current is not less than 50A. For long-term use, a brass tube with water must be used for cooling. The copper tube of the output port can be installed with a copper tube with a diameter of 10mm at most; when the copper diameter is not more than 4mm, the copper tube can be welded to the clamp, and then the copper tube can be fixed; when the diameter is not more than 2mm, the output terminal can be connected.     This model is mainly used for heating and is suitable for heating power below 300W.     Colour: Black     Material: PCB     feature:     PCB board size: 165.1 x 112.41 x 1.6mm/6.5 x 4.4 x 0.063 inches     Input voltage DC 12V ~ 40V     Maximum input current 50A (short circuit)     Recommended input voltage range DC 24V ~ 36V     Weight: 780g     When used for heating power supply, the power supply must be large enough           Package Contents:     1 x 50A/1000w ZVS induction heating machine product voltage     1 x 48V brass tube     1 set x brass cylinder and screws          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 measurement allowed error is +/- 1-3cm.