Description
YN4001 Power meter is a compact and an easy-to-use testing instrument for optical fiber networks, which can be used for absolute optical power measurements as well as for relative loss measurements in optical fibers. It features ingenious appearance, wide range of power measurement, high accuracy and user self-calibration function with high performance-to-price ratio.

Features
● User self calibration function
● Comfortable LCD display and optional backlight LCD display supports
night operation
● Power measurements in dBm or mw and insertion loss in dB
● Low battery consumption, more than 240 hours continual operation time
for three 1.5V alkaline batteries
● Optional 10 minutes Auto-off function