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Content：

 bluetooth audio amplifier board,bluetooth stereo amplifier module,class D mini bluetooth speaker board ,class D bluetooth audio amplifier module

• Bluetooth V2.1+EDR
• Headset profile, Hands free profile, Advanced Audio Distribution Profile (A2DP) and AVRCP
• Frequency range: 2.40GHz-2.48GHz
• Transmitter power: Class 2
• Working distance range: 10m
• Talk time: up to 18 hours
• Working time: up to 8 hours
• Charge time: 2.5 hours
• Battery: Li-ion battery 3.7V 320mA
• Charge Working Voltage: DC 5V 500mA or adaptor DC 5V 500mA
• Charge port: MINI USB
• Frequency Response: 20-20KHz
• Standby time: up to 200 hours
  with 3.5mm audio input
  volume control:V+/V- 

             output:2*3W
          With phone hand free calling
             can use USB port to charge