Bluetooth speaker

1,Bluetooth specification：2.1+EDR
2,Bluetooth source：Headset, Hands free, A2DP, AVRCP
3,Frequency range：2.4GHZ
4,Effective distance：10 meters with no obstruction
5,Speaker impedance：4 Ohms
6,S/N ratio：80dB
7,Frequency response：100Hz-20KHz
8,Distortion：＜1%
9,Audio input：Blue tooth, or 3.5mm audio input interface
10,Built-in FM （87-108MHz）
11,Power output：3W*2
12,Antimagnetic，Two 2-inch speakers, bass module radiation
13,Power Supply：1.5V*4AA battery, or external 5V power supply