High quality speakers and microphones.

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For detail : http://bit.ly/15uKtuk
Main Features:
Bluetooth synchronous broadcasting function
Play music from Bluetooth devices including mobile phones, iPhone, iPod, iPad and Android Tablets, MP3/MP4 players, PC or MAC laptops PSP, etc
Supports TF card (Micro SD card) for playback from built-in MP3 player
Support A2DP, AVRCP, headset, hands free profile

Specifications:
Bluetooth version: V2.1
Working range: Up to 10 meters
Battery charge time: 2 hours
Talking time: Up to 5 hours
Speadker: 45mm
Loudspeaker output: 3W
Signal-to-noise ratio: >95dB
TF/Micro SDcard support
Frequency response: 280HZ-16KHZ
Lithium-ion battery input: 520mAh/DC5V
Product weight: 238 g
Package weight: 360 g
Product size (L x W x H): 6.0 x 6.0 x 5.0 cm
Package size (L x W x H): 11.0 x 7.5 x 7.1 cm