Usage Tips:Colour liquid crystal display: This small, portable aquarium thermometer is equipped with a bright backlight, you can clearly check the temperature even in the dark. Temperature measurement range: -50°C~110°C /-58°F~230°F. Accurate and responsive: with rust-proof waterproof NTC probe 1 metre, this digital thermometer for PC has great sensitivity and accuracy. Temperature Update: 0.25 seconds Accuracy: ±0.5°C/±0.5°F 【°C/°F switchable】This LCD thermometer simultaneously displays digital temperature and hands, Celsius and Fahrenheit can be freely converted. USB power supply: this thermometer with probe uses a USB port as a power supply. Easy to connect to PC, laptop, power bank, USB socket or any other USB port. Wide application: this thermometer with waterproof sensor is widely used in aquariums, pets, vehicles, air conditioners, refrigerators, freezers, water heaters, greenhouses, incubators, computer case temperature detection, DIY, etc.