Features: 1.Short circuit protection & reverse polarity protection & waterproof protection. 2. power & low energy consumption & excellent results, the use of conversation frequency electronic technology. 3.Full current limiting protection, intelligent pulse, frequency / low frequency regulation, can be adjusted according to the need to adjust the frequency of the electric field size. 4.Use advanced numerical controller technology and exclusive designed computer program. Unique binarys output structure. duty cycle and frequency can be adjusted, so that they do not affect each other. 5.100% Satisfaction: Any further question about it, please feel free to contact us. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: 1.Initial peaks power: 500W 2.Continuous power: 250W 3.Digital display: input/output voltage 4.Input voltage: 12VDC 5.Output voltage: 220VAC / 110VAC 6.Dual USB interface: 5VDC / 2.1A 7.No-load current: ≤0.5A 8.Conversion efficiency: greater than 90% 9.Protection function: overload, over temperature, voltage, low voltage, reverse connection, short circuit 10.Intelligent temperature control, can be used for electrical appliances below 300W (except inductive load electrical appliances and motor products) Include: 1 x Ultrasonic Inverter