Characteristics of safety: 1. Overload protection, the power will be automatically cut off. 2. The integral fuse provides the safety guarantee. 3. Low voltage warning, the power will be automatically cut off. 4. Overvoltage protection, the power will be automatically cut off. 5. Overhumidity protection, the power will be automatically cut off. 6. Short circuit protection, the power will be automatically cut off. 7. Modified sine wave output, distortion rate ,1.5% 8. 90% conversion efficiency Operation: Insert the front part of the product into the cigar lighter socket. Confirm the power light is on. Insert the plug of electrical appliances into the socket of the product. Technical Index: Max continuous power: 200W Max Efficiency: >90% Input Voltage: DC11V-15V Output Voltage: AC198V-242V Current while no load: 0.25A Ambient temperature: 0°C~40°C Output Wave shape:Modified sine wave: (THD<1.5%) Warning while low voltage: 10.4V11V High voltage to cut off: DC15V-16V Low voltage to cut off: DC1V-11V