Specifications: Model: EL-P01 Operating Frequency: 2.420GHz~2.483GHz Tracing System: optical Transmission Distance: >10 m 360° Operating Current: 15mA Resolutions Adjustable: 500/1000 dpi Power Supply: 1.5V AAA x 1 System Requirements: Windows 2000/XP/Vista/7, Android, Linux, Mac OS Package size: 18 x 12 x 4.7 cm Package weight: 97g Package included: 1 x Pen Mouse