description:Commodity details:1. music player， high-power long extroverted;2. LineIn function， external intelligence;3. built-in 1450mAH high capacity rechargeable batteries to support native Long Play;4. using the latest technology class D digital amplifier， sound quality is extraordinary;5. built-in large capacity memory， can store a lot of songs and information;6. full-featured All in One interface design， all have a single external interface;7. full-function LED indication;8. USB high-speed transmission;9. the speaker output: THD + N = 0.15% @ 1.5W SNR = 94db @ 1.5W10. headphone output: THD + N = 0.6% @ 32�� SNR = 92 db @ 32��11. playing time: use the speaker about 10 to 22 hours (depending on the volume) using the headset for about 70 hours12. the charging time: USB charging: 5 hours USB (5V / 1A) AC transformer charge: 4 hours (optional)