With 4AH battery, charge by 12VDC car power & AC power 30L foledable bucket,portable and quited a space saver Easy ... etc. You can use it anywhere and anytime with battery power. It's a good ai of you ... you are at home or traveling. Characteristic With battery,one charge can last for 1.5 hour running ... stop when the gun on/off. 30L foledable bucket,portable and practical,quited a space saver. 7M hose,to ...