Features: The ST8819A High distinctness Meter delivers accurate magnetic measurements (0.01mT resolution) with its advanced , ideal for detecting /dynamic fields in labs and industrial settings. coupled with wide pattern detection from 0 2000mT for versatile magnetic field testing applications. and educators requiring electromagnetic radiation detection in physics experiments, control, or STEM education. factory equipment inspection, and educational demonstrations where portable magnetic measurement and data logging capabilities are critical. this handheld magnetic field tester includes protective casing and 100 data point storage for on site and long term trend . Specifications: Materials: ABS. Size: 168x65x30mm. Weight: 600g. pattern: 0~2000mT (20000Gs). Accuracy: ±1.0%. Temperature pattern: -10°C~60°C. Humidity pattern: 5.0% ~98.0% . Temperature accuracy: ±1.5°C. Humidity accuracy: (5.0% ~39.9% ) ±7% , (40% ~80.9% ) ±4% , (81% ~98% ) ±7% . Resolution: Humidity 0.1% Temperature 0.1°C. Working environment: 0°C~50°C 20%~85% -condensation. Storage environment: -20°C~70°C <85% -condensation. Hall probe: The Hall probe is equipped with a standard wire length of 1 meter. Resolution: 0.01mT (0.1Gs)(0-999.99mT), 0.1mT (1Gs)(1000mT or ). Package Includes: Tester , probe , cloth bag , manual , note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.