Product Description TLD1500 Series is high quality of Optical Fiber Checker. It contains the most advanced laser technology and microelectronics technology, and can be measured with various fiber optic adapter with 2.5mm common Interface. It is very convenient for them to check the single-mode and multimode fiber. Features High visible red laser output Easy-to-use "quick access" interface Small size, light weight, high reliability Battery for power supply Suitable for all 2.5 mm optical fiber connector Applications Fiber production and research devices Fiber network testing and maintenance Optical communication teaching and test