In 1 Rechargeable Battery Powered Fiber Optic Tester Optical Power Meter -70~+10dbm With 10mw Vfl Visual Fault Locator 2 in 1 optical fiber tester with Optical Power Meter (-70~+10dBmand Visual Fault Locator (10mW) functions, no need to use separate devices, more convenient and powerful. High accuracy of 0.2dB, high linearity of 0.1dB, and stable visual locator output of 10mw, ensuring stable and accurate measurement results. Powered by rechargeable Li-battery -ion with USB charging port, there is no need to replace the battery frequently and you can save money.Auto shut-off function helps extend working hours and standby time. The outer rubber shell increases the protection of the device while improving the hand-holding feeling when using in the field. This fiber optic tester adopts a universal interface 2.5mm, FC and SC connectors are included.It is an ideal tester for telecommunications and CATV maintenance.