For Jawbone Jambox Bluetooth Speaker HPF(TM) 2-Port Dual USB Car Charger Adapter with USB Charging Data Cable HPF Register Trademark (Sold only by AccessoriesZone) Dual USB sockets allow you to charge 2 devices at once Charge most devices that use a USB charging cable, (iPod, iPhone, cell phone, MP3, PDA, Blackberry etc..)) IC Chip recognizes a full battery & automatically switches to saver mode Can be used with input voltages from 12V to 24V DC (both car & truck) Comes with LED charging indicator