Zhengzhou where to sell a dedicated fiber optical talkie? [Zhengzhou] Hanson Radio Communications Tel: 18939564786 Phone JW4103 JW4103 Optical Talk light / light machine is Jiahui company developed a new generation of intelligent optical instruments, widely used in digital data networks, telecommunications networks and cable TV fiber optic line works , testing, maintenance and fiber attenuation measurements, enabling full-duplex communication, call quality is high, not because of the distance varies. JW4103 series optical phone call functions in addition to, and has a steady light? Blowing tomb δ archery? Product Features: Full duplex digital voice access features clear voice, background noise and provides online display and call features large-screen displays battery low voltage prompt technical indicators : Instrument Model JW4103 wavelength recognition range 1310/1550 ± 20nm Emitter FP-LD transmission distance 80km Dynamic Range 40dBm (9/125um) Output power -5 ~-7dBm (9/125um) CW or 2KHz, 1KHz, 270Hz modulation output stability of ± 0.1dB / ± 0.25dB (1/8hrs) CW temperature ± 0.02dBm / ℃ working time 5 hours (continuous) Power Rechargeable Battery + Charging Adapter Fiber Optic Connector FC / PC Dimensions (mm) 215 × 115 × 55 Weight (g) 520 Optical Communication Equipment Co., Ltd., Zhengzhou Hanson Contact: Mr Zhu Tel: 18939564786 QQ: 1006519081 Address: Zhengzhou City, Shandong Bauhinia Street west 300 meters