Features: 1. Digital display for easy reading. 2. light weight, small size, easy to carry 3. Display Unit, Lb / Kg / N 4. Short-circuit protection, leakage protection, overload protection 5. Low battery indicator Parameter: Model: SF-500 SF-50 SF-5 Maximum load: 500N / 50Kg / 110 Lb 50N / 5Kg / 11 Lb 5N / 0.5Kg / 1.1 Lb Load division value: 0.1N / 0.01Kg / 0.01Lb 0.01N / 0.001Kg / 0.001Lb 0.001N / 0.001Kg / 0.001Lb Sensor Structure: Inside Accuracy: ± 0.5% Power: 3.7V lithium battery Charging time: 4 ~ 6h Continuous battery use time: about 15h Battery Life: ≥300 times Charger: Input (AC 220V 50HZ), output (DC 5V 1000mA) Operating temperature: 5-35 ℃ Transport temperature: -10-60 ℃ Relative Humidity: 15% -80% RH Package Included: 1x set of Digital Force Gauge