PH Meter With Backlight PH-991 Tester Durable Acidimeter Tool Temp Monitor For Aquarium Swim Pool Water

Features: Automatic shutdown Backlight Display Online monitoring Range: pH 0.00 ~ 14.00 TEMP: -50°C ~ 70°C (-58°F ~ 158°F) Resolution: pH 0.01 TEMP: 0.1°C (0.2°F) Accuracy: pH ± 0.1 TEMP: ±1.0°C (±2.0°F) Temperature Compensation: 0°C ~ 50°C (32°F ~ 122°F) Environmental temperature: 0°C ~ 50°C (32°F~ 122°C) Power supply: DC 6V (Power Adapter Usable) Battery: 4×1.5V AG-13 Button Cell Batteries (NOT Included)