... ATC 4. LCD indicates both pH & temp. all in one pen type low cost ph meter FEATURES: 1. 0 ... & temp.2. Pen type digital pH meter, all in one, pH electrode included, easy to use9. Data hold ... . Power supply by 1.5 V battery (LR44 ) x 4 PCs6. Build in temperature sensor, ATC (auto temperature ... 9.1814. Auto power offSPECIFICATIONS: DisplayLCD, size : 20 mm x 27 mm. ConsumptionMeasurement RangepH0 to 14 pH ...