塑料

Colors: Green, Blue, Black, Red for choosing
Input Power: DC 5V/1A
Output Power: DC 5V/1A; 5V/2A (4 USB output at the same time)
Working Time:  5~6 time (tested by iPhone with 1450mAh battery)
Fully Charge Time: 3~5 hours

Features:
1. Built in grade A batteries, fully charge your iPhone
2. Standard USB output, fits all cellphones with USB cable
3. Durable and more than 5000 times cyclically using
4. Smart protecting from short circuit, over charge and over discharge
5. Auto power off while not charging for cellphones, avoid power consumption
6. Compatiable with most digital devices on market, such as ipod, MP3, MP4, GPS, cameras and cellphoens
7. Portable and convenient to use, great for travel and office use