1[Visual Fault Locator] The visual fault locator is designed for maintenance of fiber cables and networks, visually locating defects on cables and identifying faults in fiber optic equipment. 2[30mW Output Power] With an output power of 30mW and a wavelength of 650nm10nm, the fiber optic pen offers accurate and efficient fault detection. 3[Non Contact Connection] The non contact connection guards fiber and transmitter end faces, and its output power is not affected by voltage fluctuations. 4[Easy to Use] Featuring an anti slip handle and a sliding switch design, this red light pen offers a comfortable grip and easy control for seamless usability. 5[Compact and Portable] Compact and lightweight, this fiber optic pen is easy to carry and provides stable power output, making it an ideal tool for fiber testing. 1 x Fiber Optic Visual Fault Locator 1 x Ceramic Core 1 x Storage Bag 1 x Hanging Rope 1 x Instruction Manual