Input Voltage: 12~24V Socket Output Voltage: 5V Socket Output Current: 2.1A USB Output Voltage: 5V USB Output Current: 2.1A Continuous Output Power: 10.5W Peak Output Power: 21W Waveform Type: Others USB: USB 2.0 Output Socket: USB 2.0 Conversion Efficiency: =85% Output Frequency: No Over Voltage Protection:Yes Low-voltage Protection:Yes Overtemperature Protection:Yes Indicator Light: No Power Cable: 48cm Application: For PDA , MP3, MP4 , Cellphone , Notebook , Digital Camera etc Package Content: 1 x Car Charger Note:This item come without retail box,but we will pack well before shipping!