■ Frequency respond:100-18KHz
■ Signal to noise ratio: ≥ 80dB
■ TF card, USB storage directly play
■ FM radio(hand cord antenna)
■ LED display
■ Internal rechargable Li-ion battery(3.7v 800mAh)
■ Power off memory
■ Long time playing
■ Number select
■ Wallyson 3D sound effect