The FieldMaxII-TO is a power-only version of the FieldMaxII-TOP. The FieldMaxII-TO laser power meter functions with a broad range of thermopile and optical sensors. Together, these sensors enable FieldMaxII-TO to measure UV, visible, and IR laser output from the nanowatt to the kilowatt range, and to work with CW and pulsed lasers. Key Features: Large, bright, backlit LCD display Digital accuracy with analog-like movement for laser tuning Works with thermopile and optical sensors only USB computer interface (Windows 8 and 10 [32 and 64 bit] compatible) Analog output with selectable full-scale voltage (1,2, and 5V) Rechargeable battery included ISO 17025 accredited