M618ZD 400ODPI WIRELESS LEFTVERTICAL MOUSE High Precision. Dual Wirele Connection DELUX 4000DPI Wirele Left Vertical Mouse (ERGO VERTICAL S) Left Ergonomic Veritcal Reduce hands preure HIGH PRESICIONUP TO 400ODPI High Precision Left Vertical Mouse Le movement, Le fatigue Ergo Buttons Layout 1.DPI BUTTON 2.BACKWARD 3.FORWARD 4.LEFT BUTTON 5.ScROLL WHEEL 6.RIGHT BUTTON 7.TYPE C PORT 8.INDICATOR LIGHT 9.ON/OFF 10.MODE sWITCH(1)2.4G WIRELESS(2)BT 4.0 7.TYPE C PORT8.INDICATOR LIGHT9.ON/OFF 10.MODE sWITCH(1)2.4G WIRELESS(2)BT 4.0 11.BLUETOOTH PARING BUTTON 12.USB NANO RECEIVER Silent Click Design Enjoy the quiet Built-in Rechargeable Battery One Full Charge For A Weeks Using (8 Hours/Days) Stable Dual mode Connection With BT 4.0 and USB Receiver