PH Meter with Backlight Online PH-991 Aquarium PH Tester Temp Monitor Durable Acidimeter Tool for Tank Swim EU Plug Automatic Shutdown Backlight Display Online Monitoring Range: pH 0.00 ~ 14.00 TEMP: -50C ~ 70C (-58F ~ 158F) Resolution: pH 0.01 TEMP: 0.1C (0.2F) Accuracy: pH 0.1 TEMP: 1.0C (2.0F) Temperature Compensation: 0C ~ 50C (32F ~ 122F) Environmental temperature: 0C ~ 50C (32F~ 122C) Power supply: DC 6V (Power Adapter Usable) Battery: 41.5V -13 Button Cell Batteries (NOT Included) Plug Type :EU Plug,it applies to Indonesia, Germany, France, , Italy and so on. Voltage: AC100-240V Colour:yellow Material:plastic Package Contents: 1 x PH Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.