Sound velocity range: 1000-9999 meter or second. Wking frequency: 5MHz. Measurement Range: 1 - 200mm (Steel), the measurement range can be set, beyond the setting range, an alarm sound will be emitted. Minimum display unit: 0.01 mm. Accuracy: (0.5% H and 0.05 mm). Measurement data count, recd the maximum value, minimum value average value of several measurement data. Observe the coupling during measurement to see if the coupling is complete. Display type: 2.4 inch LCD. Units of measurement: mm inch. Overall dimensions: 65x146x30mm. Weight: 130g, perfect f easy stage taking anywhere. Stes up to 500 readings recall function. Two calibration methods. Sound velocity f different material which also adjustable. Capable of measuring materials, including steel, copper, aluminum, glass, plastic, ceramics, resin much me. Diffusely applied in maunfature fields, metal procesing, commercial inspection. It can also monit pipes pressure vessels in production equipment to monit their degree of crosion during use. Colour:black Material:ABSandmetal Package Contents: 1 thickness gauge 1 sens 3 rechargeable batteries (1.2 V each) 1 USB data cable 1 charger (5V, 1A) 1 hard carrying case Only the above package content, other products are not included. Note: Light different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.