pecifications:
LCD digital display: 4 digits.
Minimum display unit: 0.1mm.
Working frequency: 5MHz.
Measurement range: 1.2-225.0 mm (Steel).
Minimum limit for tubes measurement: 20 x 3mm (Steel).
Accuracy: ± (1% H + 0.1 mm) (H denotes the measured thickness).
Sound velocity range: 1000-9999m/s.
Measuring sound velocity with a given thickness.
Measuring range: 1000-9999m/s.
When the given thickness over 20 mm, the accuracy is ±1%; when the given thickness less than 20mm, the accuracy is ±5%.
Operating temperature: 0 - 40°C (32 - 104 °F).
Power supply: 3 x 1.5 AAA alkaline batteries (not included).

Operation current:

Normal operation current ‰¤ 50 mA.
With backlight turn on current ‰¤ 120 mA.
Stand-by current: ‰¤ 20 μA.
Size: approx. 72 x 146 x 29 mm. (2.83 x 5.75 x 1.14 inches).

Package includes:
1 x Ultrasonic thickness meter (with rubber cover)
1 x Transducer (10 mm, 5 MHz)
1 x 4 mm Sample block
1 x Bottle of coupling agent (50 ml)
1 x Operating manual
3 x AAA alkaline batteries
1 x Storage box