Features The grain hardness tester with digital display, easy for reading and high accuracy. Light weight, small size and easy for carrying. Two units : Kg and N switch into each other. The battery has short circuit ,leakage and overload protection , adopt 3.7V Lithium battery power supply, will shut down automatically without operation within 10 minutes. Two measuring modes: Real time and Peak mode. Specifications Model：AGW-20 Max. Load：20kg；196N Load division value：0.01kg；0.1N Load cell ：Inner Accuracy：±2％ Power：3.7V Lithium battery Charger time：4~6 hours Battery Continuous use：About 15 hours Battery life：≥300 times Charger：Input：AC 100-240V 50/60HZ ； Output：DC 5V 1000mA Working temperature：5℃～35℃ Transport temperature：-10℃～60℃ Relative humidity：15％～80％RH Working environment：No source and corrosive media around Package 1 x Digital Grain Hardness Tester 1 x Charger（5V) 1 x User manual 1 x Warranty card 1 x Check certificate 1 x Dryer 1 x Hex nuts（M6) 1 x Height adjustment table A 1 x Height adjustment table B