This is an easy-to-use instrument to test the water quality of drinking water, aquarium, swimming pool and so on. It adopts sensitive probe and can test TDS quickly and accurately. Mini size and light weight, it’s convenient and portable to carry with you anywhere. Note: 1. TDS is one of the indexes of water quality; you can’t just rely on it. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Blue Material: ABS Screen: Digital Display TDS Measuring Range: 0-9999ppm Accuracy: ±2% (F.S) Resolution: 1ppm Function: TDS Testing, Data Hold Built-in Battery: 2 * 1.5V LR44 Button Battery Working Temperature: 0~50°C Item Size: 142 * 25 * 15mm / 5.59 * 0.98 * 0.59in Package Size: 15 * 3 * 3cm / 5.91 * 1.18 * 1.18in Package Weight: 44g / 1.55oz Package List: 1 * TDS Water Tester 1 * Small Leather Bag