Function: speaker/handsfree/TF card/FM radio
Material: metal
Logo: silkscreen/laser carving
Packing: blue gift box with window/white gift box optional
Bluetooth version: JR3.0.
 Frequency: 2.402-2.480GHz.
 Mxx power output: 3W 
 Mic sensitivity: -32dbB
 Receive sensitivity: better than +82dBm.
 Range: 10 meters 
 Data transmission: up to 3Mbps
 UART data transmission rate: 115200bps .
 Charging voltage: 4.8V –5.2V DC.
 Working voltage: 3.7V –4.2V DC.
 Working current:  300MA.
 Quiescent current: >1UA.
 Battery: 400mAh.
 Antenna: built-in