WF8801

1.Full duplex digital communication with high quality conversation connection and low background noise
2.Together with Optical Clip-on Coupler, enables on line communications available
3.Combining functions of both a digital optical phone call and a stabilized light source.
4.Large LCD display with backlight
5.Low battery power indication
6.Laser source have the modulation of 270Hz,330Hz,1KHz,2KHz