XTRALIS – VLF-250COMPATIBLE WITH THE ENTIRE FAMILY OF VESDA LASER PRODUCTS (VLP, VLS, VLC, ETC…).ADJUSTABLE SENSITIVITY RANGE IS 0.008 – 6% RO 6.4 /FT. OBS., BUILT – IN CIRCULAR DISPLAY, 3 LEVELS OF ALARM PROVIDED. USE FOR AREAS UP TO 2,500 SQUARE FEET.