professional USB Mini Wireless Bluetooth Speaker for MP3 Player

professional USB Mini Wireless Bluetooth Speaker for MP3 Player Specifications: 1.Wirless Bluetooth Input; 2.Audio Transmission ; 3.Handsfree function ; 4.TF Card function; 5.FM Optional Function: Bluetooth Version:3.0. Frenquency:2.402-2.480GHz. MAX Power output:3W MIC Sensitivity:-32db . Receive Sensitivity:Better than +82dBm. Range:10meters Data Transmission:Up to 3Mbps UART Data Transmission Rate:115200bps . Charing Voltage :4.8V –5.2V DC. Working Voltage:3.7V –4.2V DC.