Bluetooth format:  Bluetooth V4.0  
    
Modulation:    GFSK,∏/4 DQPSK,8DPSK  
    
Supply voltage:    3.3-4.2V  
    
Bluetooth protocol:  HFPV1.6,HSPV1.2,A2DPV1.2,AVRCPV1.4,DIV1.3  
    
Working current:    ≤30mA  
    
Standby Current:    <50uA  
    
Temperature Range:    -40℃to +80℃  
    
Wireless transmission range:    
  Greater than 10 m  
    
Transmission power:  Stand by:CLASS1/CLASS2/CLASS3Adjustable maximum:8dBm  
    
   Sensitivity:  80dBm<0.1%BER  
    
Frequency Range:  2.4GHz-2.480GHz  
    
External Interface:  PIO,SPI,Audio in/out and PCM,USB  
    
Audio Performance:  Stand by:AAC,MP3,SBC,Stereo  
    
Audio SNR:  ≥75dB  
    
Distortion:  ≤0.1%