Specification:
Dual USB 3.1A output.
Voltage and current meter tester.
Easy to satisfy your need with dual USB socket.
Fixed support helps stabilize the USB car charger.
Multifunction product with 10A protection tube, perfect for travel use.
Apply to all USB charging mobile phones or other electronic products.
This easily installed 5V, 2.1A output port holds your smart phone, GPS, MP3.
Optimized for iPad, iPhone and iPod-fast loading at full speed.(2.1 amps for 
iPad, 1 amp for iPhone / iPod.)
Double 3.1A USB output,built-in PTTC over-current protection function.System will automatically cut off power supply when the input 
current or output current exceeds the safety current.
Input voltage:DC 12V-24V
Output voltage:DC 5V Output current:3.1A
Voltage measuring range:5V-25V
Current measuring range:0-3.1A
Accuracy: +-1%
Approved by CE 
Package Includes:
1 x Dual USB Car Charger Adapter