The meter include two probes , one is Axial probe , one is Metal probe . Feature: ●The product consists of three measurement accuracies, +/-1%, +/-2%, +/-5%, with different grades for different prices. (The product for this order 's accuracy is +/-2% ) ● Dedicated to measuring the surface flux density of permanent magnet materials B, range: 0 to 2400 mT ● The value can be switched by one button: mT (mite) or G (gauss). ● With automatic zero and auto range, and maximum hold function. ● With backlight adjustment, power display and automatic shutdown function. ● Light weight and low power consumption. Introduction: The design of TD8620 hand-held digital Tesla meter follows the IEC-61010-1 safety standard, and conforms to the national verification regulation of JJG242-1995 Tesla meter. TD8620 hand-held digital Tesla meter adopts not only the high-sensitivity Hall sensor and high-resolution A / D conversion chip, but also the popular single-chip computer technology and digital filtering technology . It has the advantages of high sensitivity, stable reading, low power consumption , and light weight. The measurement range is 0-2000 Mt, and the basic accuracy is ±1%. It has the characteristics of automatic zero, automatic measurement range, keeping of maximum / minimum values, etc. Specification: Level 2 technical specifications Range :200 mT 2000 mT Range of measurements:0 ~ 120% Minimum resolution :10uT Basic accuracy :±2% Number of digits displayed :4 bits (Decimal) Power supply :one 9 V battery(battery not included) Working temperature :0℃ ~ 50℃ Storage temperature :-20℃ ~ 50℃ Shape size :160 mm × 80 mm × 32 mm Device weight :260 g (including batteries and wires) Hall probe Longitudinal Hall probe, wire length is about 2 meters