20m usb的蓝牙耳机dongle，usb蓝牙源适配器wi

bluetooth dongle,USB bluetooth dongle,bluetooth adapter, usb dongle, usb bluetooth adapter Chipset:CSR Boundled software:IVT 2.7 Operation Range:20m different ID licence Different colour is available CE, FCC, ROHS Special Features: Bluetooth V2.1 + EDR (Enhanced Data Rate) Up to 3 times faster file transfer rate. Enhanced Data Rata (EDR) compliant for both 2Mbps and 3Mbps modulation modes Class II standard that supports an operating range of 20 meters Supports the newest Vista OS and Mac OS X Unlimited wireless applications (including multimedia applications). It can supports maximum 7 Bluetooth devices at the same time. Improves usability through smoother multi-device scenarios Support A2DP Hi-Fi headset Be able to coexistence Portable, lightweight and mini sized Full speed USB v2.0 interface Rosh leadless material qualified Friendly to operate user's interface and an easy "plug-in" installation Stable, accurate and sensible search of devices in range Specifications Standard: Bluetooth 2.1, EDR, Class II Platform: Windows 2000, XP, Vista, Mac OS Interfaces: USB 2.0 Operating Range: 20 meters Frequency: 2.4GHz 2.4835GHz ISM Band Transmitter Power: +2 dBm(class II) Receiver Sensitivity: a.(Bluetooth v1.2) <0.1% BER at -80 dBm b.(Bluetooth v2.0) <-82 dBm (typical), GFSK Power consumption: 70mA(working) Data Speed: Up to 3 Mbps Operation Temperature: -10 55 degree C Storage Temperature: -20 65 degree C Humidity: 10% 90% non-condensing DC Power(Supply Voltage): 5V from USB Spread Spectrum: FHSS LED Indicator: Single LED Net Weight: 7g Gross Weight: 41g