ELECOM Wireless Trackball Mouse, Large Ball, 8 Buttons, Tilt Function, Black, M-HT1DRBK

[Connection method] Wireless 2.4GHz band [Number of buttons] 8 (including wheel button) [Size] LL size (114.7mm wide x 181.9mm deep x 57.2mm high), ergonomic design, with lift rest [Power supply] Two AA alkaline, manganese, or nickel-metal hydride batteries. Low energy mode: approximately 534 days, high speed mode: approximately 325 days (assuming 5% of the 8 hours of computer use per day is allocated to mouse operations) [Warranty period] 6 months [Sensor method] Optical sensor [Weight] Approximately 260g (excluding accessories) [2017 Good Design Award] Winner