Oakton EcoTestr* pH1 Waterproof Pocket Tester^ Oakton EcoTestr* pH1 Waterproof Pocket Tester, pH: 0-14, Battery: 4 AAAs, Automatically recognizes pH buffer standards, Large LCD dual-line display, Rugged IP67-rated housing, Leakproof cap with fill line, Width: 1-1/2in, Length: 7in, Height: 1-1/5in This listing is for Each