Austin 4000 mAh power bank. This 4000 mAh rechargeable lithium polymer Grade A battery is enough to charge smartphones, MP3 players and more. Reusable power bank charges via USB cable (included) which can recharge the battery backup or be used to charge devices with micro-USB input like Android smartphones from Samsung, Motorola, HTC, Nokia, and others. Four blue LED lights illuminate to indicate charging level. Input: 5V 1000mA. Output: 5V 1000mA. Packed in a black carton box. . Plastic.