1.This is a new high-grade Wireless Mouse with 5-level adjustable DPI & 7 Buttons(including 2 customized buttons). Features reliability・ ease-of-use・ and user comfort・ this wireless mouse gives you fast data transmission and no delay or dropouts. You deserve it!<br /><br />2.Low Power Indicator for Alarm to Change New Battery<br />As the mouse working in a certain time・ the battery will be out of power・ low power indicator will be flash in red・ to alarm yo change new battery.<br /><br />3.Power Saving Mode and Power Switch off<br />If mouse stays out of work for 8 minutes・ it will turn to power saving mode・ press any button to restart it.<br />If you turn off PC or take out Nano receiver from USB port・ press any button or move the mouse to enter the power saving mode.<br /><br />4.Ergonomic Design<br />Ergonomic Design・ comfortable and great hand-feeling・ can be used for a long time without fatigue. <br /><br />5.Compact Receiver<br />The wireless tiny receiver can be inserted into the slot next to the battery slot・ allowing ease of storage when not used.<br />Solid Storage Case<br />The plastic storage case is robust and solid enough to protect your mouse when you do not use it.<br /><br />How to set DPI:<br />Press DPI button・ if the red indicator light flashes once・ its DPI is 800.<br />Press DPI button・ if the red indicator light flashes twice・ its DPI is 1200.<br />Press DPI button・ if the red indicator light flashes three times・ its DPI is 1600.<br