Features: 1.Adopt red infrared ray technique,it allows you to measure distance with red infrared light,which is high-accuracy and efficient. 2.Handheld design,mini size and portable,with simple button design that is convenient and easy to operate and use. 3.3 types of units can be optional,meter/feet/inch,no need to change units every for time for it will keep your last unit setting. 4.Powered by lithium battery,provides you rechargeable use,and can measure distance for 2000 times when fully charged. 5.Less measurement error,about 2mm,which can be ignored,and excellent for indoor use,for house measurement. 6.Great measurement meter for home,factory,housing,warehouse,industry,and etc. 7.High quality and durable,fashionable appearance,with high technology,offering you wonderful using experience,waterproof and accurate. diastimeter only,other accessories demo in the picture are not included Specifications: Measuring range: 0.33-30m(98ft) Accuracy: +2.0 mm(