Instructions for 12V100W Car Power Inverter: Working condition: Put the product in the dry, ventilated and cool place. Keep the product away from water or rain. Working (operating) temperature: 14°F-140°F ( -10℃--+60℃) How to use: 1. Insert the inverter cigar head into cigarette lighter socket of car. Please ensure that the inverter cigar head is connected well. 2. Please ensure that the electric appliance power is below nominal power of the power inverter. Insert the 220V plug of electric appliance into power inverter 220V socket. Then turn on change-over switch. If the green indicator light is lit, it shows that the power inverter works well. If the light is not lit, check power inverter protection due to overvoltage, low-voltage, overload or over-temperature. 3. Technical parameters: Input Voltage: 10.5V-14.5DC Output Voltage: 200V-235VAC Frequency: 50±2 Hz Waveform: Square Wave Undervoltage alarm: 10V Over-voltage alarm: 15V No-load current: 0.2A Maximum power: 100W Peak power: 200W Protection temperature: 167°F (75℃) 4. Power Inverter Dimensions: 83*64*38mm Net weight: 250g Packing Box Dimensions: 140*107*45mm 5. Packing Carton Dimensions: 630*340*340mm 6.Packing quantity: 88pcs