SAGA Digital Aquarium pH Monitor Package Complete Kit: monitor, electrode, power adapter, calibration solutions (7.00 & 4.00), monitor clip, & probe mount Specifically designed for freshwater & marine/reef aquarium use. Continuous monitoring via power adapter or 9V battery powered for portable use (batter not included) Universal probe mount secures the electrode to most aquarium types (standard, rimless, eurobrace, etc.) Calibration solutions are premixed. Large LCD display.BNC input connection. 0.01 Resolution; 1-year manufacturer warranty. 5.9" x 3.4" x 1.6"