High fidelity, stereo, you will enjoy high-quality music; High quality LCD, the white LED backlight makes a wider angle of view; Suitable for IPHONE 4 / 4S / 3GS; Car charger input voltage / current: 10.5-24V / >/=1A; Output voltage (IPOD head): DC 5 ± 0.25V; Output Current (IPOD head): 1000mA; USB output voltage: DC 5 ± 0.25V; USB Output Current: 1000mA