the Flir LS64 handheld thermal night vision monocular has a 30hz refresh rate, 640x512 pixel detector, and a maximum range of 1,200 yards. With small size and a large detector, the LS64 uses a USB-charging internal lithium-ion battery and a four-button operation. Other features include an auto-focusing display, an internal targeting laser to indicate heat without thermal devices, military standard white-hot and black-hot displays, and 4 levels of Instalert™ polarity which colors heat above a certain temperature bright red.