TLD1306 series of digital variable optical attenuator is designed by our company according to the developing optical communication and the application of the project. Its with the small volume, light weight, low power consumption, has the competitive price and capability. This handheld variable attenuator enables consistent operation in various testing situation, such as photoelectric device, optical passive component, optical fiber, optical cable, optical fiber communication, as well as the construction and maintenance of the fiber communication engineering.