Hign-concerned Chemical:NoneMaterial:PCB board + components + plasticBrand Name:BoFaCarryOrigin:Mainland ChinaDescription: Input Voltage: DC 12-30V (This voltage range is the voltage during operation, not the voltage when the power supply is unloaded). Wide Use: Because of its moderate power, it can be used for small parts DIY players to do hardening, annealing and other heat treatment. Practical: Excessive current on the bottom adds tin treatment for greater overload capacity. Color Light: The board kit comes with seven color flashing lights, and the effect is very beautiful and special. Note: The higher the voltage, the greater the heating current, the effect is better, so to eradicate the actual situation to select the input voltage. Specification: Color: As shown. Material: PCB board + components + plastic. Package Size: Approx. 21x16x5.5cm/8.27x6.3x2.17inch. Input voltage: DC 12-30V. Input current: more than 10A. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: Type 1: 1 Piece Control Board. 1 Piece High Voltage Package. Type 2: 1 Piece Control Board. Type 3: 1 Piece High Voltage Package.