Brand GuoYu Model ZW036 Quantity 1 Color Black Material ABS Connection Method Wireless Bluetooth Version No Connection Type USB Operation Distance 10m Tracking Method Optical Laser Type No Resolution 1000 dpi Power Supply 2 x AAA batteries (included) OS System Windows XP / Vista / Win 7 Other Smart power saving mode 4-step power saving mode low power consumption auto sleep mode; the mouse will be deep sleep as the receiver unplug or the computer shut down; Anti-skidding silicone roll design ergonomic design comfortable to control Packing List 1 x Wireless mouse 1 x Receiver 2 x AAA batteries