Details Features - Mini receiverSlip battery coverWide wheelMove freely in 10 meter's areaErgonomic battery cover design; easy to operate.Powered by 2 x AAA batteries (Battery NOT included)With LED indicator. When it is folded; it sleeps to stop working. When unfolded; it continues to work. Battery status indicator - If battery is in low power; the indicator will be red. Computer Connection - Wireless Wireless transmission frequency - 2.4GHzType - Optical MouseOptical Resolution - 1200 (dpi)Key number - 3 (key)Supports OS - Windows 2000/ Vista / Win7 / Win8 Applicable models - desktop; laptop 1; We are pure-heart seller and our goal is 5 STARS. We hope to provide you with the best products and best service; And strive for 100% customer satisfaction! 2; When you receive the product; if you are satisfied with this product; Please kindly leave us positive feedback; we will try our best to do better. 3; If you have any problem with the item; Please do contact us in advance before leaving a