Elecom Wired/Wireless Track ball Silent Thumb 8 button Mice Black M-XPT1MRXBK\nThis product data sheet is originally written in English.\n\nElecom Wired/Wireless Track ball Silent Thumb 8 button Mice Black M-XPT1MRXBK Product description:\nUses long-life components and achieves a 3-year warranty. The EX-G PRO, a high-spec model of a thumb-operated trackball that has evolved further.\n[Connection method] Wired / wireless 2.4Ghz (receiver included) / Bluetooth\n[Number of buttons] 8 buttons * Includes wheel buttons * Tilt wheel mounted\n[Size] W 108.0 x D 135.0 x H 47.7mm\n[Power source] AA alkaline batteries, AA manganese batteries, AA nickel hydride batteries (Estimated battery life: [2.4GHz connection mode] Low energy mode: Approx. 301 days, High speed mode : Approximately 211 days / [in Bluetooth connection mode] Low energy mode: Approx. 366 days, High speed mode: Approx. 240 days * When 5% of PC operation for 8 hours a day is assigned to mouse operation)\n[Warranty period] 3 yearr