Preserve the signal
Smart power indication
Fully enclosed protective case

Input:DC 5v 500mA

Output:DC 5v 500mA

Capacity:1700mAh

Dimension:L128*W62*T17.6mm

Weight:65g

Compatibility:iPhone 4

Standby time: up to 210 hours

Talk time: up to 5 hours on 3G network

        Up to 10 hours on 2G network

Internet use: up to 4.5 hours on 3G network

          Up to 7 hours on Wi-Fi

Audio play: up to 28 hours

Video play: up to 7 hours