NK120 series VFL has high-power of 650nm laser as emit ting device, and the output power can reach more than 15mW. It is suitable for SM/MM optical fiber, used to detect optical fiber connectivity and fault location such as optical fiber fracture and bending. It is equipped with 18650 rechargeable battery (2200mAh) with large capacity for power supply. The universal adapter is used, which is suitable for FC, SC, ST connectors. It is an ideal tool to test various types of optical fiber jumpers, ribbon and bundle pigtails, as well as on-site or optical fiber line maintenance.