Built-in high performance 16-bit DSP and a 16 bit sigma-delta D/A converter with earphone power amplifier.
Support MPEG-1/2/2.5 layer 1/2/3. WMA decoder.
Card reader: Support USB2.0 card host interface : Secure Digital™ / Multi Media Card™ (SD/MMC);Supports FAT12, FAT16 or FAT32 file system format; Supports up to 16GB SDHC card
Built-in high performance class D digital amplifier. and digital volume control.
40mm neodymium magnet micro driver speakers；
Power supply: Two AA batteries; PC/Notebook USB; USB power adapter;
8 hours play time when using AA alkaline batteries at normal volume levels.
Flexible software upgrade via USB interface.
With bracket so the speaker can stand up when needed.

Specifications

Dimensions 156mm*65mm*26mm(H*W*T)
Weight 155g (without batteries)
Display Power display led x1 , status display led x 1;
PC Interface USB2.0 high speed Data Transfer
Memory Depends on SD/MMC card, up to 16G SD card
Play time up to 8 Hours of Continuous Music Playback
Audio
WMA(VBR) 8-355kbps
MP3(VBR) 8Kbps-320Kbps
Earphone Output 220mV@16Ω
Earphone Output Frequency Band 20Hz-20kHz
S/N Ratio >80dB
Distortion Rate <0.5%
Amplifier
Output Power 1.2W + 1.2W
S/N >75dB A-weight
THD+N <0.8%
Speaker
Frequency Band 150Hz-20kHz
Impedance 6 Ω
Power AA battery X 2 or DC 5V 800mA
*Note: Design and specifications are subject to change without notice.