It is track ball mouse to roll ball with finger, and to use. You have a choice between forefinger, the middle finger operation type, thumb operation type, forefinger operation type.
It is track ball of Bluetooth® connection type that we can use by wireless without receiver if it integrates Bluetooth® into PC.
Even if mouse and PC are far, we do not have to worry to break off with electric wave. Wireless connection is possible with PC of Bluetooth® non-correspondence.
It is type to wire that is battery-free. It is good to long-time work.