For iPhone 4 Battery & FM Transmitter & Ha

For iPhone4 Battery & FM Transmitter & Handsfree Car Kit *The portable3 in 1 power magic gives you full access to charge foriphone 4 & iPhone 3GS& iPod. *Meantime it support charging other mobiles and digital devices via USB output port. *wireless FM transmitter ability lets youshare the music from your iphone& iPod on your car's FM radio. *It also keep chargingwhenyoushare your favorite music playing for the longest road trip. *For FM transmitter function, It's simple to use, just to plug the 30 pin connectorinto iphone or iPod. For other music player or mobile phone, you can use the standard 3.5mm earphone jack for connecting. *With High qualityCircuit Protection Module Specifications: Battery Input: 5pin Mini USB 5V-0.5A Output: 30pin standard iphone interface and USB interface 5V-1.0A Capacity: 1300mAh Li-Pol A grade battery Compatibility: Work with iPhone 2G, 3G, 3Gs, 4G, iPod, Mobile phone and other digital products. Standby: 200 hours FM Transmitter Interface: 3.5mm audio interface for mobile phones and30pin connector for iPhone & iPod Frequency: 76 108MHz , adjust frequency by press button + and - by 0.1MHz Hands free speaker Frequency response: 20Hz-20 KHz Working range: 3-9 meters Sensitivity: ≥50dB Working electric current: 50mA Standby electric current: 90μA Power: built-in battery Audio input: 3.5mm stereo earphone jacket Working electric current: 50mA Microphone sensitivity: -42 ± 3 d