roduct Description (1) Play MMC / SD card to store the MP3 / WMA files(no bluetooth). (2) connected to the computer reading and writing files to the MMC / SD / TF (to be equipped with card sets) card for the card reader function. (3) 3.5mm audio output common port, headphone playing music output to other audio devices. (4) 3.5mm universal audio input port can be used as headset other audio playback devices. (5) High-quality speakers and sound chamber designed to ensure high-fidelity, CD sound quality, (6) 5B rechargeable batteries, convenient can easily replace the battery, and practical. Parameters (1) Support Computer System: Windows98, win2000, win XP, win Vista (2) USB Interface: High Speed USB 2.0; (3) support memory cards: MMC Card, SD Card, (need to add an SD card adapter) (4) The maximum supported card capacity: 16GB (5) Support music file formats: MP3wma (6) Support audio sample rate: 8-48KHZ (MP3 bit rates: 8-448kbs, WMA bit rates: 32-384kbs) (7) Battery: 5B rechargeable battery (3.7V 400mah); (8) Charging power supply: computer USB port DC5V; DC 5V (500MA) Travel Charger: DC 5V (500MA) Car Charger (9) Continuous working time: about 8 hours; (10) LCD status indicator; (11) Frequency Response: 12Hz-25KHz; (12) SNR: 70db; (13) Output Power: 2X10mW.