Item Type: Digital Water Tester Pen_x005F_x000D_Material: ABS_x005F_x000D_Battery Type: Built In Button Battery (Shipped With Built In Button Battery)_x005F_x000D_Battery Model: LR44_x005F_x000D_Battery Capacity: 3 x 150mAh_x005F_x000D_Gross Weight: 167g/5. 9oz_x005F_x000D_Size: Approx. 18. 5x3. 8cm / 7. 3x1. 5in 14 IN 1 DESIGN: Water tester pen is a 4 in 1 design that tests TDS, EC, PH, and TEMP, and is easy to operate with one click to switch between test properties. 2LARGE HD LCD SCREEN: 4 in 1 PH TDS EC Temp meter uses a large HD LCD screen to ensure that the values can be seen in dimly lit areas. 3HIGH ACCURACY: Water PH TDS meter uses a titanium alloy probe to measure water with high accuracy, ensuring accurate measurement values. 4IP65 LEVEL DUSTPROOF WATERPROOF: Digital water quality tester pen is IP65 level dustproof and waterproof, safer and more secure to use. 5SCOPE OF APPLICATION: Water quality tester is suitable for drinking water, aquaculture, swimming pools, aquariums, hydroponics, laboratories, catering industry, etc.