1) CE, FCC, UL certified; 2) RF technology optical mouse; 3) with rechargeable; 4) Freely 360-degree use within 1.5m radius; 5) Plug in to use 6) Tracks on most transparent (glass) or mirrored surfaces; 7) Automatically power-saving sleeping function; 8) UV oil treating or rubber coating colors 9) Blister or color box provided; Size: 128*66*39mm