Water Quality Monitor, Durable Portable Clearly Firm Digital Water Quality Tester, for EC Specification: Item Type: Water Quality Tester Material: ABS Color: As shown in the picture Size: Approx.188x38mm/7.4x1.5in Weight: Approx.160g/5.6oz Battery: 3 x 1.5V button battery LR44 150MAH(Not included) Temperature Range: 0.1-60.0 degrees Celsius 32.0-140℉ Temperature Accuracy: ±0.5 degrees Celsius Temperature Resolution: 0.1 degrees Celsius /℉ Working Environment: 0 to 60.0 degrees Celsius (32.0-140℉); <90% Temperature Compensation: Automatic temperature compensation (ATC) Factor: 0.5 Salinity: Resolution: 0.01% Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%) Package List: 1 x Water Quality Tester(Battery Not Included) 1 x Instruction Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.