C-zone Digital LCD Handheld Infrared Rangefinders Ultrasonic Distance Measurer Diameter - Meter Range Finder, CP-3010

1.Your distance measurer transmits ultrasonic waves to a point you want to measure
2.Auto OFF: switches off if you do not press any key for about 1 min Measure time
3.It measures the time taken by the waves to reflect and then calculates and re-transcribes the distance
4.Level function(one vertical level bubble, one horizontal level bubble) Package Weight: about 70g.
5.Measure distance from 0.5m to 18m Accuracy +-0.5% +-1cm Resolution 1cm or 2\\\\1 inch Units of Measure : Feet/Meters