Model Number: WD-66B Brand Name: WD Key Specifications/Special Features: USB connectors with 2 sound channels to achieve the solution of virtual 7.1 sound channel and provide virtual but real 3D surroundedsound of 7.1 channelConnected by USB connector, no need to connect power and do not worry about different security stipulation in different areaDirectly insert into PC (do not need any driving software if above Win98), good compatibilityDigital sound transmission to meet the sound requirement of new generation's multimediaSNR exceed +100dB, extreme low noise, ensure to obtain the sound transmission with high quality

Equipped with adjustable equalizer to remedy the traditional speaker's short coming

Softer cable, both inside and outside are all shielded to resist the electromagnetic interferer and improve the transmission speed

Support the sound result of increasing 20dB to increase the output sound from speaker

Support the sound result of increasing 20dB to increase the input sound from microphone

Speaker specifications:

• Diameter: 40mm
• Sensitivity: 115dB±3dB
• Resistance: 32 ±10%
• Frequency responses: 20 to 20000Hz

Microphone specifications:

• Type: 6 x 5mm
• Sensitivity: -58±2dB
• Wire length: 2300±50mm
• Connector: standard USB connector