Features
•  Bluetooth specification: V2.1+EDR
•  Bluetooth profiles supported: HSP, HFP, A2DP and AVRCP
•  Various calling features:
   -Last number redialed
   -Voice dialing
   -Call-rejection
   -Call-waiting
   -Headphones with adjustable volume
•  Up to 11 hours of talking time
•  Up to 10 hours of music playing time
•  Up to 4 hours of charging time (USB 5V)
•  Up to 250 hours of standby time
•  Operation range by Bluetooth Class II-10M (33ft)
•  Compatible with Bluetooth-enabled mobile phone, PC,    Laptop or iPad

Specification
MICROPHONE
•  Directivity: Omni-Directional
•  Frequency Response: 100Hz~100KHz
•  Impedance: 2.2K OHM at 1 KHz
•  Sensitivity: 4.5x5.0/ -54±2dB

HEADPHONE
•  Drive Unit: 30mm dia.
•  Impedance: 32 OHM / 1 KHz
•  Frequency Response: 20Hz~20KHz
•  Sensitivity: 93dB /nW±3dB
•  Maximum Input Power: 10MW