The Flir LS32 compact handheld thermal night vision monocular has a 7.5hz refresh rate, 336x256 pixel detector, and a maximum range of 600 yards. The LS32 was built on Flir's smallest chassis, uses a USB-charging internal lithium-ion battery, and has a four-button operation. The LS32 features an auto-focusing display, 2x digital zoom, and internal targeting laser to indicate heat without thermal devices. Military standard white-hot and black-hot displays are included as well as 4 levels of Instalert™ polarity which colors subjects above a certain temperature bright red.