Product Details Fangrui Product Details 1. High Definition Backlight Display Screen: Clearer Reading At Night. 2. Detachable Probe: The Electrode Can Be Replaced. More Convenient Maintenance And Storage. 3. High Quality Probe: Rust Proof, , Suitable For Soils. 4. Lock Button: After The Value Stabilizes, Click The Hold Button To Lock The Current Value. If You Need To Re Measure, Please The Hold Button Again. 5. Widely Used: Suitable For Greenhouse Planting, Horticultural Planting, Farmland Planting, Laboratory, Agriculture, Etc. Temperature Compensation Range: Automatic (-30 -80 Electrode: Replaceable Electrode Battery Level: Low Battery Warning Backlight: Supports Backlighting Shutdown: Automatic Shutdown For About 10 Minutes Power Supply Mode: 3 X 1.5vlr44 Button Cell (not Included) Usage Environment: -30.0 -80.0 Rh: Max Waterproof Grade: Ip67 Display:lcd Backlight Display Ec Range: 0.00-10.00ms/cm; Resolution: 0.01ms/cm Accuracy: F.s Temp Range: -30c-80.0c; -22.0f-176.0f Resolution: 0.1c; 0.1f Accuracy: 0.5