It combines a 30m laser measuring instrument with a 5m tape measure for ease of use and simple measurement in the surroundings and distances in the vicinity High precision: The infrared range is exactly 0.001m for more precision and more accurate measurement With backlit display. See the data clearly FASTER AND MORE ACCURATE MEASUREMENT: Accurately measure distances up to 98 feet indoors. 0.001M Switchable between meters and inches feet on the digital LCD display; metric and inch scale on the 16ft tape measure for reading light near measurement projects 5V USB power port allows USB charger such as PC/laptop or power bank, USB charger to be recharged. It will take a week for it 3 hours of charging