It is a whistle marked by the tag "DEEVO" and blog articles. It allows to add a tag to a product and a blog article in this site and to display a relevant thing.
A referee whistle dedicated to the volleyball competition style will be released from the sports equipment manufacturer's morten. It is a competition whistle that follows football's Balkin, Basketbratza. Since VORCA dedicated to the handball referee is also released at the same time, the competition whistle will be a total of four types.