1. High-precision LED digital display, intuitive and clear. ^^ 2.8 cm smart fan, excellent heat dissipation, effectively extend fan life and reduce noise. ^^3. The use of advanced technology to effectively reduce the weight of the power and convenience of mobile power. ^^4. A variety of protection, current limiting protection (OCP), over temperature protection (OTP), Over Power Protection (OPP). ^^5. plastic panels, more beautiful, voltage, current, coarse and fine adjustment knob to set the settings to be more precise.