Gift Pro &reg; Extremely Stable Aluminum Tube Electric Wine Bottle Opener, Low Power Alarm (Green) Easy to operate. Open the battery box when using, put in 4 AA batteries. Press the "start" button below to take out the cork, press the "back" button above, you can exit the bottle. Low Power Alarm, Can be opened more than 80 bottles of wine (need four 2800MA Batteries). Batteries are not included Package:1*Opener