A4Tech Rechargeable Lithium Ion Battery Pinpoint Optic Shuttle Series Wireless USB Mouse (G11-570HX-4) Long life, rechargeable Lithium Ion Charging Status Indicator, battery stops charging automatically when fully charged Operating Range Up to 15 Meters Multi-Link receiver connects Up to 3 Sets KBs/Mice DPI button: 5 adjustable 800-1000-1200-1600-2000 DPI Customizable shuttle key allows added functions Transmission: 2.4G Wireless range: 15m