Features: Two measurement , magnetic induction for magnetic substrates such as iron and steel; eddy current for substrates such as brass, aluminium, zinc etc. ; Highly sensitive probe, automatically identify the substrates Three measurement modes, single measurement, continuous measurement, fast continuous measurement; IPS High-definition color screen with clear and easy reading, more settings of brightness, color, screen rotation; Built-in lithium battery, USB direct charging, eco-friendly and durable; Multiple calibration modes (automatic probe calibration, manual zero calibration, manual multiple points calibration), better decreasing the measurement errors and secure the accurate measurement; 2S fast switch on, 50 data can be stored; high and low alarm value can be set Measurement principle: electromagnetic induction/eddy current effect Test range: 0-2000UM Error: (2.5%+2UM) Display accuracy: 0.1M (0-99.9M) 1M (100M) Unit: UM, MM, MILS Minimum convex curvature radius: 5MM Minimum concave curvature radius: 25MM Minimum measuring area diameter: 20MM Minimum substrate thickness: 0.2MM/0.05MM Calibration: infinite point calibration, zero point calibration, multi-point calibration. Battery: 3.7V/750MAH polymer lithium battery Charging voltage and current: 5V/500MA USB interface: Mini B Operating environment: Temperature: 0~ 50C (32 ~122xF); temperature 20% ~ 90%RH; no strong magnetic field; no strong electromagnetic interference Storage environment: Temperature: -10 ~60C (-14~140F) Material: plastic colour: black Package Contents: 1 set coating thickness gauge 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.