... 1, high-fidelity, high resolution DIGITAL stereo effect. PLL lock-in technology 2. LCD screen displays with the tuning frequency more intuitive 3 ... lighter power supply 7, 3.5mm audio input interface for portable CD, MD, MP3, MP4, PDA, PC, IPOD, DVD, etc, any player ... IPOD and 3.5 audio plugs 9, with USB interface, with charging function (direct to MP3 power supply or battery charging) 10, transmitter ...