75 minute run time with consistent power throughout the entire discharge. Noise level of only 45 dB(A) is excellent for daytime cleaning or cleaning occupied areas. Adjustable back support, waist and shoulder straps are designed to minimize operator fatigue. Cordless operation eliminates accidents, such as tripping, commonly associated with power cords. Superior soil recovery prolongs your carpet's life. ASTB7 kit includes 1 battery and 1 charger.