NK120 series VFL pen has high-power of 650nm laser asemitting device, and the output power can reach more than15mW. It is suitable for SM/MM optical fiber, used to detectoptical fiber connectivity and fault location such as opticalfiber fracture and bending. It is equipped with 18650rechargeable battery (1800mAh) with large capacity forpower supply.The universal adapter is used, which is suitable for FC, SC,ST connectors. It is an ideal tool to test various types ofoptical fiber jumpers, ribbon and bundle pigtails, as well ason-site or optical fiber line maintenance.