... 2.high-fidelity, high resolution DIGITAL stereo effect. 3.holder function. 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 ...