Fashion neck-hang design, suit to use as doing sports, simple, handy, Adopt light, high rigidity material, Highly sensitive hidden microphone, vivid speaker, Single wiring design avoiding winding, elegant timbre.

Mic Dimensions:Φ6.0X2.7mm Sensitivity:-58dB±2dB Impedance:≤2.2KΩ Driver Diameter:Φ30.0mm Impedance:32Ω Fequency Response:20~20kHz Sensitivity(S.P.L):105.0dB±3dB(1KHz) Plug:Φ3.5mm

Optical:PSII/USB 2、400-800dpi 3、Compatible for Windows95/98/2000/XP/NT 4、Human engineering designing,suitablefor either right- handed or left-handed person.

Driver Unit：Ø10mm Frequency Range：5~25KHz Sensitivity：106dB（at 1KHz） Impedance：16Ω Cable Length：Appr. 1.1M Plug： Ø3.5mm

1821 wireless phone can receive audio from any digital products which have audio-receiving function, such as: Television, MP3, CD, VCD, DVD, walkman etc I-1821 is composed of transmitter and receiver, the transmitter can emit the multimedia voice in the form of broadcast, while the receiver to receive the voice...

Stylish and dynamic appearance,Padded headband for increased comfort, Adopts light, stainless steel material, durable to wear, Adopt large scale volume unit, hi-fi speaker, revivify music perfectly, anti-noise,Simple and elegant design make it easy to wear, and fit for all heads’ size