Specifications:<br>New design with double 3.1A USB output， PTTC over-currentprotection， display the voltage， temperature and currentalternately by each 10 seconds. Auto power off while the inputcurrent or output current is greater than the safety current，please plug out will working again.<br>Features:<br>Dual USB 3.1A output<br>With temperature and current meter tester<br>Easy to satisfy your need with dual USB socket<br>Fixed support helps stabilize the USB car charger<br>Multifunction product with 10A protection tube， perfect for traveluse<br>Apply to all USB charging mobile phones or other electronicproducts<br>This easily installed 5V， 2.1A output port holds your smart phone，GPS， MP3<br>Optimized for iPad， iPhone and iPod-fast loading at full speed(2.1amps for iPad， 1 amp for iPhone / iPod.)<br>Specification:<br>Type: 4 in 1 Car Charger<br>Case Color: Black<br>LCD Digital Color: Red， Blue<br>Output Interface: USB<br>Input Voltage: DC 12-24V (u00b10.2V)<br>Output Voltage: DC 5V (u00b10.1A)<br>Outout Current: 3.1A<br>Voltage Measuring Range: 5-25V<br>Current Measuring Range: 0.1A-3.1A<br>Compatible Brand: Universal<br>Compatible Model: Universal<br>Conversion Efficiency: 95%<br>Temperature Measurement Range: -20u2103 to +80u2103 (u00b11u2103)<br>Size: 42mm x 78mm x 20mm/1.65" x 3.07" x 0.79" (Approx.)