usb pass through 1.CE,FCC,ROHS 2.USB Port 3.4 Voltage adjustable 4.Easy carry ... best selling Variable Voltage 3.2~4.8V usb pass through Specifications:1.Model: VV Pass through Battery2.Style:Smart ... , light color from Blue to Green.4.Come with USB Cable(Port)5.Battery threads: 510 threads6.Power Switc: ... EMS,TNT,DHL,UPS,FEDEX/Air transport How to order: 1. Tell us which models, Quantities, you want to ...