Kool(TM) FM Transmitter Car Charger Kit for Apple iPhone 5 5S 5C iPod Touch 5th Generation Designed Specifically for Apple iPhone 5 5S 5C iPod Touch 5th Generation; Supports hands-free conversations through your car speaker Built-in rechargeable lithium battery 120 mAh, operating time more than 4 hours High fidelity stereo, Digital PLL Wireless audio transmission LCD display with backlight.