VicTsing ergonomic designed wireless mouse frees Tangle from cord and hand fatigue from annoying mice pact designed its compact design makes it easy to bring the mouse with you wherever you need it A Nano transceiver plugs into your computer's USB port for a reliable wireless connection No worrying about signal interference High movement resolution high movement resolution Allows the mouse to track on nearly any surface including tabletop paper or even cloth 3 power-saving modes effectively extend battery life to 12 months no need to frequently replace batteries Stage 1 Auto into power saving mode when the mouse is of inactivity Press any button to wake it up Stage 2 Auto into sleep mode when the mouse is of inactivity for 10 minutes Press any button to wake it up Stage 3 completely shut off the mouse via the switch button on the back of the mouse 1 The USB Nano receiver is stored in the battery compartment of the mouse under the battery cover 2 Please use 1*AA alkaline battery To avoid corrosiveness please take out the battery if the mouse doesn't work for a long time 3 To ensure the transmission quality Please avoid big obstructions between the mouse and the receiver when using Product Dimension 4 02 x 2 36 x 1 50 inch/10 2 x 6 x 3 8Cm(l x W x h) net weight 2 47oz/70g operation range 32 8ft/10m working voltage 1 5V working current 15ma standby time 12 months battery Type 1*AA battery (not included) compatibility Windows 2000/XP/Vista/7/8/10 Mac os package included 1 x Wireless mouse 1 x USB Nano receiver 1x User Manual