BIRUGEAR Black 2100mA 2-Port USB Wall Travel Charger for Barnes & Noble Nook HD+ 9 Inch, Nook HD 7-Inch Brand new 2 Port USB wall charger. Fast charging for multiple devices, including iPad, iPhone/iPod,MP3 and smartphone Input: 12v DC. Output: 5.0V / 2000mA. 2 USB Port. Short circuit protection. LED charging indication. Intelligent IC chip inside recognizes a fully charged battery and automatically switches to a saver mode to prevent overcharging and short circuit. You must have a USB charging cable (sold separately) in order to charge your device with this charger.