The tool is a digital measure tape combined with IR distance meter for daily household measurement or the profeional decoration worker measuring tasks.Features:1. 3-in-1 Distance Measuring Tool: it combined with a 5m traditional measuring tape, digital measure tape, and 40m infrared distance meter in a single unit.2. Infrared Measurer: the measure range up to 40m, installed with full functions of area, volume, pythagoras 2&3 points measurement, and 20 sets of memories could be read over.3. Digital Tape Measurer: precise figures are fast displayed on screen when the measure tape are pulled out. Area and volume functions are workable under the digital display mode. Besides, the tape lock prevents any poible harm to ensure safety operation.4. LCD Display: 2.0-inch black screen with backlight, the measured data are easily to read even in dark environment.5. Lithium Battery Power Supply: built-in the rechargeable battery makes it more economical and environmental.6. Compact Pocket Size: square design in horizontal lines structure guarantees precise results. Smooth surface and round edges to enhance the comfortable hand feeling.Specifications:Measurement Range: 40mMaterial: ABSIR MEASURER:Range: 40m(131ft)Measure Accuracy: (3.0mm+5x10^(-5)D)Unit: m/ft/in/'"Reference: Front/RearIR Cla: Cla 2IR Type: 630-670nmMeasurement: Single Measurement, area measurement, volume measurement, pythagoras measurementLCD: 2" black screenHistory: 20 setsDevice off: 180sIR off: 30sBacklight off: 10sBattery: 1 * 3.7V 300mAh rechargeable lithium batteryWorking Temperature: 0~40Storage Temperature: -10~60USB Port: Micro USBTAPE MEASURER:Length: 5m / 16.4ftTape Accuracy: 1.5mmDigital Accuracy: 2mmTape Width: 19mmHorizontal Stand-out: 1.8mMeasurement: Area measurement, volume measurementTape Unit: ft/inItem Size: 82 * 82 * 44mm / 3.23 * 3.23 * 1.73inItem Weight: 270g / 9.52ozPackage Weight: 391g / 13.79ozPackage Size: 16.3 * 11.6 * 5.2cm / 6.42 * 4.57 * 2.05in Packing List:1 * Measurer