DC Gaussmeter Model GM1-ST with Aluminium Carrying Case Range/Resolution: 19,999.9 G/0.1 G; with polarity indicator Accuracy: +/- 1% of reading (16 to 29C); +/- 2% (-4 to 65C) Offset: Auto-Zero. Also fine offset (0.1 gauss resolution) Probe (non-detachable): 1.5 (thick) x 4.3 x 24 mm Meter Size: 5.2 x 3.6 x 1.6 inches; 132 x 91 x 41 mm; Weight: 8 oz