Feature:1. thickness gauge is controlled by a microprocessor, which can measure thickness quickly and accurately.2. It has the speed of sound of various materials without affecting the measurement.3. Suitable for materials that conduct and reflect constant sound velocity, such as metals, plastics, ceramics, glass, etc.4. When transmitting at a constant speed, the waves reflected from the back of instrument can be distinguished, and accurate effect.5. The shell using wear-resistant ABS material, which is durable and long-lasting, compact and portable.Specification:Item Type: Thickness MeterMaterial: ABSPurpose: Used for thickness measurement of metal, glass and other materialsMeasuring Range: 1.00-300.00mmData Storage: 1500Whether a probe selection: YesOperating Frequency: 5MHz/2.5MHzMeasurement Error: ±(0.5%H + 0.05)MmMinimum Pipe Measurement: Ф20x3mm (Steel)Sound Speed Adjustment Range: 1000-9999m / SWorking Temperature Range: 0~40℃Battery: 3Pcs 1.2V AAA Battery (Battery Not Included)Probe Application:5Md10: 1.0-300.0mm5Md6: 1.0-100.0mm25M: 1.2-300.0mmHigh Temperature: 1.2-300.0mmHow to Use:Open the back cover to load the battery (not included) or connect to the power source, press and hold the power button to turn on, the VEL button represents the sound speed adjustment button; Up: up selection button; MENU: power on and off\menu; ESC: exit button; Down: selection switch Button; OK: Confirm button, long press the power button to shut down. Package List:1 x Thickness Meter (Battery Not Included)1 x Manual1 x Plastic Box1 x USB Cable2 x Probe Cable1 x Adapter