Feature:1. Sensitive and Accurate: This TDS water tester uses a titanium alloy probe for greater sensitivity and more accurate testing.2. Portable and Convenient to Use: Compact in size and easy to carry around, so it can support to test the purity of water anywhere and anytime.3. HD Backlit Display: Black frosted translucent shell with white backlit HD display, and the data is clearly visible wherever and whenever.4. Easy To Operate: TDS test pen with simple button operation, just power on and use, quick test with high accuracy.5. Wide Compatibility: The water quality test meter has a wide range of applications, such as drinking water, sewage treatment, water purification, aquaculture, hydroponics, etcSpecification:Item Type: TDS Test PenMaterial: ABSBattery: 1.5V Button Battery 2 x CR2302 (Shipped Without Battery)Application: Domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, fish tank water quality, greenhouse flowers, bottled water, community water stationBasic Parameters:Test Range: 0 - 9990pm.Package List:1 x Tester