Feature Automatic pressure relief: the expansion head automatically resets after the expansion of the tube is completed Hydraulic expansion head, quick loading and unloading: four threads with large pitch, lock the expansion head in 1 second LED auxiliary lighting: suitable for harsh environments such as dark light Easy to expand tube: powered by lithium battery. Save time and effort. One-key operation, simple and efficient Hassle-free battery life ●2000mAh lithium battery. Up to 220 uses on a full charge ●50W ultra-fast flash charge, fully charged in 35 minutes