- Bluetooth transmission distance- 30 FT – Great sound quality – 3.0 standard function – Can be connected to any smartphones, computer devices, MP3, MP4, DVD, VCD, CD, PMP (all kinds of games and any other digital device with audio output) – Independent player: plug in a SD card, you can automatically play music files stored (MP3, WMA, WAV) – Built-in lithium battery, or 5V Micro USB power supply – Memory function: automatically play songs from the last song played – Frequency Range: 100 hz- 20 KHZ – Signal to noise ratio: 84 db or higher – Sensitivity: 80 db + 2 db – Playing time: 180 minutes – Charging time: 120 minutes – Includes cable to charge device – Includes Audio Cable