LS213 already contains the velocities of several common metallic (such as iron, copper, aluminum) and non-metallic materials (plastics, ceramics, organic glass) as well as other objects and the user are not required to find them separately. Measuring range: 0.8-350mm (45# steel)Resolution: 0.8-100mm: 0.01mm;100-350mm: 0.1mm; Measurement accuracy 0.8-10mm: 0.05mm; 10-350mm: 0.5% of reading Color: yellow Material: ABS Features: 1. Ultrasonic double crystal probe 2. Automatic Gain switchable Some materials are good conductors of sound and some are not. For the latter, the meter can switch the Gain freely which is to amplify the ultrasonic signal so that the emitted pulse is accurately captured by the transducer as it propagates, and obtains accurate data. 3. Two measurement modes: QC Mode/Statistics Mode LS213 ultrasonic thickness tester features two measurement mode: QC mode and statistics mode. Allowing to set upper and lower limits to check the problem areas by prompting NG under the QC mode. It will count maximum, minimum and average values of data in Statistics mode. 4. Excellent Timer chips provide fast, accurate readings LS213 ultrasonic thickness gauge calculates the material thickness by sound velocity and the time taken between the emitted pulse and the detected echo, a precision timing chip can bring the user the accurate time to get the accurate data. 5. Built-in sound velocity of multiple materials Without 2XAA battery Package Contents: 1X Ultrasonic Thickness Gauge 1X ultrasonic dual crystal probe (5MHz) 1X ultrasonic gel (empty bottle) 1X Non-slip silicone sleeve 1X Chinese and English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_