NON CONTACT LASER TACHOMETER SPECIFICATIONS: MEASURING RANGE:2.5-99999RPM RESOLUTION:0.1RPM, AT 2.5~999.9RPM;1RPM, AT 1000~99, 999 RPM ACCURACY:±0.02%+1DIGTAL MEASURING DISTANCE:50~500MM SAMPLING TIME:0.5S(ABOVE120RPM) OPERATION TEMPERATURE:0 TO 50OC(32 TO 122OF) OPERATION HUMIDITY:10 TO 90%RH STORAGE TEMPERATURE: -10 TO 60OC(14 TO 140OF) STORAGE HUMIDITY:10 TO 75%RH DIMENSION:145*90*35MM WEIGHT:120G(INCLUDED BATTERY) FEATURES: MINI HANDHELD GUN TYPE DESIGN AUTOMATIC AND MANUAL MEASUREMENT SELECTABLE DATA RECORD AND RECALL MAX/MIN/AVG VALUE RECORD FUNCTION RECORD TIME INTERVAL SETUP FUNCTION LCD WITH WHITE BACKLIGHT DATA HOLD FUNCTION AUTO AND MAMUAL POWER OFF LOW BATTERY INDICATION ORIGIN : GABY ISNTRUMENTS DELIVERY : IMMEDIATE