Specifications:

Twin Socket Car Adapter with Two USB Port and Extension Cord
Input: DC12-24V
Output:  5V2.1A,3.1A(total）
Two12V/24V sockets
2 USB ports
With LED indicator
With 1 meter straight cord
Fused protection
Maximum output current 6A  
with CE & ROHS 
Packing:

double blister
carton size:53.8*43.8*42.1cm/6pcs/inner box/72pcs/ctn