Features: Brand?new?and?high?quality. Vertical?ergonomic?design?perfectly?fits?the?natural?contour?of?the?wrist?and?the?palm. Special?designed?finger?slot. Two?options?for?left-hander?and?right-hander. 3?adjustable?DPI?levels?to?customize?your?game?play?experience?400，800，1600 Optical?laser?technology?for?precise?control. It?has?L/R?mouse?buttons，?2?thumb?buttons，?and?a?clickable?scroll?wheel. Rechargeable?built-in?battery?will?never?require?batteries?and?will?be?more?convenient?and?practical?for?you?to?use. Built-in?iron，?making?center?of?gravity?more?stable. Comfortable?hand-holding?posture?of?this?product?increases?the?control?frequency?of?your?mice，?removes?occupational?carpal?tunnel?syndrome. Professionally?designed?for?office?staff?and?gamers.?The?right，?left?and?roller?keys?are?uniquely?deigned?on?the?side，?which?will?make?your?hand?under?the?most?relaxing?state?during?using.?Thus，?it?reduces?the?fatigue?of?the?hand. Specifications: Color:?black，?black?&?blue，?black?&?purple，?black?&?silver?grey Size:?102?x?72?x?82?mm Connection?method:?Wireless DPI:?1600 Connection?port:?USB?2.0 Button:?left/right?button，?roller?button，?forward/back?button，?middle(on/off)?button. Wireless?range:?about?10m Rating:?5V?10mA Charging?time:?about?2?hours Compatible?with:?Win98/2000/XP/VISTA/7/8/MAC Net?weight:?116g Package?includes: 1?x?Wireless?Ergonomic?Vertical?USB?Mouse?(battery?is?included) 1?x?USB?cable