Hair Straightener is mainly composed of DC supply, temperature control and working circuit. The DC power supply part is composed of rectifier circuit and voltage control circuit; the temperature control part generates different control signals through counters, and controls the temperature through different resistance and negative temperature coefficients; the working circuit is mainly composed of heat pipes that can generate heat. Teencher Inspection team consists of professional quality control and international trade experts, each member with extensive inspection experience and very strong sense of service. our inspection can help you to reduce logistics costs, return risk, complaints, compensation and potential brand reputation due to quality problems.