With 2.4 GHz Radio Frequency technology, the Adesso iMouse E30 Wireless Vertical Righthanded Ergonomic Mouse provides you with wireless convenience and the freedom of a smooth connection for up to a 30-foot range without tangled cables. This ergonomic mouse is designed with a vertical orientation and a contoured shape that provides a uniquely comfortable user experience. With this wrist-friendly contour support, you will hold your hand in a healthy handshake position which is the neutral position of your forearm as opposed to the twisted forearm position as with a regular mouse. Two internet buttons are conveniently located on the side of the mouse for Back and Forward page browsing. The switchable DPI button on the top provides multiple levels of mouse cursor speed that is useful in different environments. The advanced Optical Sensor technology keeps the mouse precisely on point and lets you work on most glass, wood, marble, and leather surfaces without a need of a mouse pad. Finally, the iMouse E30 is Plug and Play and requires no drivers. Simply plug the USB Receiver into any available USB port and be ready to enjoy the freedom of a comfortable and wireless mouse experience!Reduces Carpal Tunnel Syndrome (CTS) The wrist-friendly contour of the Adesso vertical mice allows you to hold your hand in a neutral “handshake position”, minimizing your forearm muscles from twisting and the possible development of Carpal Tunnel Syndrome. Normally, your forearm muscles are twisted from sitting flat on the supporting surface when using a regular mouse. This “flat position” causes strains on your muscles and leads to wrist pains. This is where the Adesso Vertical Mice become helpful and provide alleviation.2.4 GHz RF Wireless Technology with On/Off Switch This mouse works at any angle with a range of up to 30 ft. with no wires to get tangled. The On/Off switch helps conserve battery power plus the low battery indicator helps you know when it is time to change batteries. Programmable Driver Adjust and customize your iMouse E30 to your liking to enhance your gaming experience with the included Programmable Driver. Easy to install, and navigate through, within the driver menu, adjust anything from mouse colors, to blinking speed, to assigning commands (macros) , extending your DPI speed up to 4800 DPI, and reprogramming buttons with a few simple steps. Ergonomic Vertical Design Our vertical ergonomic design helps you achieve a more natural grip, better support, and natural wrist position. With our sleek design and added support, the Adesso Vertical Ergonomic  iMouse E30 is perfect for long hours of use. Adjustable 3 Level DPI Switch (800 / 1600 / 2400) Attain higher precision and better accuracy with your choice of 3 DPI levels. Easily switch from three different DPI levels which change color depending on the level chosen. From 800 (green),1600 (blue) and 2400 (red) the easily-accessible DPI button lets you quickly switch between the various computer tasks you partake throughout the day.Specifications:Connectivity: USBPower: 2 AAA BatteriesOrientation: RightButtons (Default): Left / Right Mouse Buttons, DPI Button, Back / Forward Buttons, Scroll Wheel / ButtonResolution: OpticalDPI Settings: Range from 400- 4800 DPI with driver (Green 800 / Blue 1600 / Red 2400 by Default)Certificates: FCC, CE, ROHS, WERCS, IC: 23351-XPACQ1Requirements:Operating System:Windows 2000 / XP / Vista / 7 / 8 / 10Connectivity Interface: USB