ship from Japan [Wireless method]: 2.4GHz RF radio wave method AUTO LINK (34 channels x 65556 ID) [Communication range]: Wooden desk (non-magnetic material) / radius approx. 10 m, steel desk (magnetic material) / radius approx. 2 m [Reading method]: Blue LED sensor method [Resolution]: 800/1200/1600 count / inch (default 1200 count) [Accessories]: Ultra-small receiver, AAA batteries (for testing) x 2, instruction manual [Supported OS]: 10 8.1 8 7 Vista XP and Mac OS X (10.2 or later) Please check the Sanwa Supply website for product support and details. Size: Mouse / W68 × D124 × H62mm, Receiver / W15 × D19 × H6mm Reading method Blue LED