Own the night with the tM 35 Thermal Imaging Clip-On Device by Swarovski! Unlike night vision devices that require a level of ambient light, the tM 35 can operate in complete darkness as it detects heat signatures rather than light amplification. The tM 35 displays these heat signatures in 2 modes: white hot and black hot. White hot displays sources of heat as white over a predominantly black background white black hot displays sources of heat as black over a predominantly white background. Toggling between the 2 modes can be useful for identifying more details.