... circuit protection. overheat protection. all by the 100% full load burn.8-shaped interface, the inputSize: 75*40*50mm ... lack of components, no tin dross, no short-circuit, no open circuit, no bad led indicator ,no high voltage, no low voltage, no output, etc3. ... temperature resistance, with power ,no bomb unit, no high voltage, no low voltage, no bad led indicator, etc5. Finished products full ...