Description: PH-961 Digital ATC Pen-type pH Meter Water Tester PH0~14 Hydroponic Aquarium Spa Pool Acidimeter Features: pH-961 pH meter precision pen is pocket PH test pen, with excellent field applicability; After all readings are automatically temperature compensated (ATC); Temperature sensor in direct contact with the solution to be measured so that accurate readings and fast; Large-screen display, high resolution and accuracy, the reading can be maintained, convenient, fast and accurate; low pressure tips, power consumption, high accuracy, wide measurement range; Measurement accuracy, simple, rugged and durable, economical and practical, in full compliance with various industry testing needs. Specification: Range: 0.00~14.00pH Resolution: 0.01pH Accuracy: ±0.1pH Battery: 2 × 3V(CR1632) Temperature Compensation: 0 C~50 C Operating Temperature: 0 C~50 C Dimensions: 147mm × 27mm×18mm Weight: 42g Package includes: 1 x Pen-type pH meter 2 x CR1632 Button Cell Batteries (installed) 1 x Mini Screwdriver 1 x Instruction Manual Details pictures: