The electric Kami-Awa Server uses ultrasonic vibrations to shake the can itself, allowing you to pour "Kami-Awa" (divine foam) directly from the can without passing through a server. Since it vibrates the can with ultrasonic waves, there's no need to wash it. Batteries (requires 2 AAA alkaline batteries) are not included. Canned beer is not included. 【Product Details】 Type: Beer Server Product Name: The Premium Malt's Electric Kami-Awa Server Ultrasonic Vibration Can Beer Server Beer Server (Navy) Color: Navy