Origin	Shanghai China
Model Number	SP W125

Model  SP W125
Wireless Interface 2.4GHz Radio Frequency Technology
Dongle Interface USB 1.1 (A type male connector)
Operating Range Indoor:> 15 meters, Outdoor:> 30 meters(in an open environment)
Transmitter power +17 dBm
RSSI -35 to -80 dBm
RF Out Power 50 Mw

Operating Channels Supports frequency hopping on 79 channels
Features Up to seven simultaneous connections within effective range
RF interface baud rate 1Mbps transmit & receive
Adaptive Frequency Hopping (AFH), support for Bluetooth + Wi-Fi co-existence 
Voice Full duplex
Toll quality (8KHz, 16bit voice)
CVSD encode/decode for voice bits stream passing through host 
Power Source One 850 mAh Li-Polymer rechargeable battery
Operating Voltage:DC 5V (Bus-Powered)
Battery Life Standby Mode:60 hours
Continuous use:6 hourser-off Mode:1-3 Months
LCD Resolution:128x32 pixels

Size:31 x 19 mm
Backlight:Blue
Language Support English, French, German, Italian, Spanish, Portuguese, Polish, Swedish, Dutch, Finnish, Norwegian, Traditional Chinese, Japanese
Response Frequency 20 Hz~20K Hz
Signal-To-Noise Ratio 90 dB
Output Impedance 150 ohm
Operating system Windows?98SE/ME*/2000/XP (All use Windows built-in audio driver).