Description：100% Brand New.LCD with Backlight.Power supply: 1 x 9v Alkaline Battery (not included)Measure Distance From 1.5 Feet to 60 FeetArea, volume, addition, subtraction calculation.Frequency: 40kHz (ultrasonic pickup)Resolution 0.01M or 1/2 InchDimensions: 15 x 7 x 3cmWeight (without battery): 130g 1 x Ultrasonic Distance Measurer (battery Not included)1 x English Manual