·Sports Card Speaker LED Indicator
 ·Stereo Subwoofer
 ·Audio formats: MP3/WMA/APE music player, adding high-performance decoder
 ·With the volume control function; dual speakers, aluminum and plastic materials to match! Very cool
 · Resistance: 4ohm
 ·Speaker: 4Ω  speakers from the 2W to 5W
 · Output power: 3W * 2
· Audio power: 90Hz
· Whole SNR: ≥ 85dB
 · Charging power supply: DC 5V
 ·Operating Voltage: DC 3.7V