"100% Brand New.Size:108mmx60mmx32mm(LxWxH)Mcu Embedded， andbased on optoelectronic， semiconductor laser and other advancedtechnology， measuring RPM is accurate non-contactWide range of themeasurement and high-resolutionAutomatic measuringand manual measuring selectionThe power of laseris of high and low selection to adapt the far and near distanceAutomatic to record50 sets of data， and the sampling interval time could be changed.Automatic to recordthe max， min and average data.LCD light helpingwork in the darkAuto shut off after30 seconds without operationSpecification:Display:5 digits LCD， Max 99999Measuring range:2.5RPM~99999 RPMResolution:2.5 RPM~999.9RPM(0.1RPM)1000 RPM~99999RPM(1RPM)Accuracy:(0.05% rdg+1 digtal)Available distance:50mm~500mmSampling time:0.5s(Over 120 RPM)Time base: Crystal oscillatorOperating temperature:0C~50CStorage temperature:-20C~60CPower Supply: 2 Pieces AAAbatteries(Not included)Power consumption :Laser in lowpower 25MA; Laser in high power:40MALaserPower: < 0.5MWPackage Content:1 x Non-Contact Digital Tachometer1 x Instruction Manual"Digital Tachometer，Non-Contact Tachometer，RPM Tester，Digital Laser Tachometer，Tachometer，Digital tachometer，speedometer tachometer，digital tachometer measurer，meter rpm digital，Handheld Non-Contact Tachometer