With 4AH battery, charge by 12VDC car power & AC power 30L foledable bucket,portable and quited a space ... . You can use it anywhere and anytime with battery power. It's a good ai of you when you ... anywhere. Easy to charged by 12V Dc or AC power. Smart switch to protect the machine,automaticly run/stop ... easily. Fix the water pistol by sucker on car roof,glass,wall,etc, let you feel the happiness of ...