ERGONOMIC DESIGNED WIRELESS MOUSE : Ergonomic vertical design encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. 
 
EASY TO USE: One nano USB receiver at the bottom of the mouse, Just Plug and Play. It provides better support and accommodates your hand in a natural position, relieves pressure in wrist joint and reduce risk of cramping.
         
MULTIFUNCTION AND CONVENIENT : Advanced "Page Back" and "Page Forward" functionality buttons provide convenience when web page browsing. 800 /1200/1600 DPI Levels -- Easily adjusts the sensitivity of the mouse.
 
WIDELY COMPATIBLE : The ergonomic mouse fits for desktop, laptop, PC and other devices. Widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. It does take a few days to get used to, once you get used to the ergonomic mouse, you'll love it so much and it will be helpful to your wrist !
              
3 DIFFERENT SENSITIVITY : 800/1200/1600 DPI, adjustable via DPI button. Used to regular office work, graphic design, photos editing etc.
 
Specification：
Model:
T24 External battery mouse
T29 Black bluetooth vertical mouse
Wireless Technology: 2.4G 
Wireless Distance: 10m 
Rated voltage / current: 1.2V/20mA 
Power supply: 2 * AAA batteries (not included)