ELECOM Trackball Mouse Wired / Wireless / Bluetooth Finger-Operated 8-Button\n\nDescription\n\nThis is a high-spec model of wireless trackball \""DEFT PRO\"" that uses long-life parts and has a 3-year warranty. \n\nIt is an index finger operation type that allows for a wide range of finger movement and comfortable cursor operation. \n\nThe left and right buttons use OMRON's 10 million times high-durability switches, which are highly reliable in terms of durability and have a good reputation for their click feeling. \n\nThe wheel scroll uses an excellent optical encoder that has excellent durability and no wear on parts during operation. \n\nBy using long-life parts, a 3-year warranty period has been achieved. \n\nA cable for wired connection and a wireless receiver are included, and you can choose from three connection methods: wired, wireless, and Bluetooth (R) according to your usage environment. \n\nIf you use the included cable for wired connection, no batteries are required. \n\nB;