Pdr brings optical talk set. The company is a nqa, qsr certified company. The product optical talk set has full duplex talk set. It is a hand free unit designed for transmitting voice on 1310/1550nm sm fiber. It features portable size, large screen, on- line display and calling and clear conversation. The product can also be used as a stable light source. It is widely used for construction, maintenance and attenuation measurement of the optical fiber project. The salient features of optical talk set: