Description HM SB-2000PRO is a very convenient salinity meter that automatically turns on by immersing the meter in a solution. When the measurement is completed, the meter sends a vibration alert making this product a convenient & user-friendly meter. With the ATC (Automatic Temperature Compensation) function, SB-2000PRO is always accurate even at high or low temperatures. SPECIFICATIONS: Measuring Range: 0.01%-10.0% Temp: 1~99°C; 33~210°F Accuracy: ±0.1~0.5% Automatic On and Off Automatic Temperature Compensation LCD screen with digital display Platinum sensor Water Proof Power source: 2 x AAA batteries Dimensions: 17.1 x 2.5 x 2.45 cm (7 x 1 x 1 inches) Weight: 66g (2.3 oz) with batteries Warranty : One Year Warranty