To order visit our website.. www.sastogadgets.com Built-in Rechargeable Battery: Eliminates the need for frequent battery replacements. Auto-sleeping LED Light: Features an energy-saving mode where the mouse and LED light automatically shut off after 8 minutes of inactivity. Stable & Accurate Tracking: Utilizes 2.4GHz wireless technology for stable transmission up to a 10-meter range. Adjustable DPI: Offers a free switch between 800, 1200, and 1600 DPI to customize precision and sensitivity.