Feature 1High Accuracy Measurement: This water quality tester pen utilizes advanced technology to provide accurate and precise test results, ensuring reliable data on water quality. 2Multifunctional Design: This tester pen can measure both the EC conductivity and TDS total dissolved solids in water, offering multiple functions in one device. 3Convenient Portability: Designed to be portable, this pen sized water tester is compact and lightweight, allowing you to test water quality anytime and anywhere. 4User Friendly Operation: With just one button, simply immerse the digital TDS EC meter into the water and obtain quick test results. It's easy to use for everyone. 5Wide Applicability: Suitable for all types of tap water, including household tap water, faucet water, and aquarium water, making it versatile for various applications.Item Type: Water Quality Tester PenMaterial: ABSWeight: Approx. 162.00g/5.71ozProduct Size: Approx. 184x43.6mm/7.2x1.7inBattery Type: Lithium battery (shipped with built in battery)Battery Model: LR44 x4Battery Capacity: 60mAh x4Temperature Range: 0 to 60C .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Water Quality Tester Pen1 x English User Manual