Professional ultrasonic thickness gauge with quick response and high accuracy. It adopts ultrasonic measuring principle and it is controlled by microprocessor.Features:Handheld ultrasonic thickness gauge for quick and precise measurement hardwares in industrial realm.The acoustic velocity values of 10 common materials are stored in the meter: steel、 zinc、 copper、 glass、 etc.Press "VEL" button to make a quick selection for the acoustic velocity of 10 common materials.Adopt ultrasonic measuring principle、 controlled by microprocessor.Calibration function helps to ensure the accuracy of measured values.LED light is convenient for night use.Specifications:Probe: 10mm 5.0MHzDisplay: 4-digit LCD DisplayFrequency: 5MHzMeasuring Range: 1.2-220mm(steel)Maximum Measurement: 225mmAccuracy: ?Ħ(1%+0.1)Coupling Agent: 50mlPower Supply: 3 * LR6 1.5V AA Battery (not included)Item Size: 13 * 7 * 3.5cm / 5.1 * 2.8 * 1.4inItem Weight: 194g / 6.9ozPackage Size: 25 * 21 * 5cm / 9.8 * 8.3 * 2inPackage Weight: 763g / 26.9ozPackage List:1 * Ultrasonic Thickness Gauge(battery not included)1 * Bottle of Coupling Agent1 * Probe1 * Case1 * User Manual(English)