It's the frequency that matters. By adopting a rechargeable battery, we set the vibration frequency to 58 kHz. As a result, it has become possible to produce even finer foam than the previous stand beer server. Feels just like a beer hall!With the included sub-zero ice pack, you can always enjoy kinkin beer! Great for everyday evening drinks, parties, outdoors, prizes for events such as in-house bingo, and as a gift. In a street survey, 96% of people said that beer tastes better. International Buyers - Please Note. We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior. We are sellers of Japan. To satisfy our customers, we will do our best.