... field test and lab project development. With features of durable structure, large LCD display with backlight and friendly operation interface, the ... for LAN, WAN, CATV, remote optical network, ect. Cooperate with ST800H Optical Power Meter, it can distinguish fiber, test optical ... /160mAh NI-MH rechargeable battery or 9V dry battery, LCD display Batteryworking duration (h)4 hoursLow voltage warning≤7. ...