Type: Pen Type Place of Origin: Henan, China Brand Name: Netutal Model Number: PH-009(i) Range: 0.0-14.0pH Resolution: 0.01pH Accuracy: �±0.01PH Power Supply: : 2*1.5V (Button Cell,LR44,keep using over 500hours) Temperature compensation: 0â??-50â?? Operating temperature: 0~80â?? N.W: 50g Carton size: 42X33.5X35CM Package: 100pcs/carton Application: swimming pool, water,liquid,hydroponics,lab,aquarium