Highly sensitive probe automatically recognizes the substrate Ultra-clear display: high-definition inverse display, day and night, the data are clearly visible Dual measurement modes: direct measurement with power on, results in seconds, easy and convenient to use Iron, lead and zinc triple-use: more comprehensive and to the point Automatic shutdown to extend battery life: built-in 600mAh lithium battery, can be set to automatic shutdown, no operation for 5 minutes automatically shut down to extend the battery life Parameters: Product Model: CTG-20 Measuring range: 0-1400m Accuracy: 3%+2m Resolution: 0.1m Calibration: Zero calibration multipoint calibration Unit: m, Small convex radius of curvature: 5mm Small concave curvature radius: 25mm Small measuring area diameter: 20mm Working environment: no strong magnetic field Operating Temperature: -10-+50 Humidity: 20%-90%RH Battery: 600mAh lithium battery Type-C interface Data storage: Support Rotatable screen: Stand Auto Power Off: Support (The product appearance and printed words depending on the batch, but this does not affect use) Color: As Shown Material: ABS Package Contents: 1 x Thickness Gauge CTG-20 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.