Mice & Trackballs Ergo-Design and Upgrade ComfortThe bluetooth ergonomic mouse with extended wrist rest fits perfectly in the palm of your hand, following the natural curve of your right hand and promoting a more natural, relaxed forearm and wirst position to reduce hand fatigue for all-day comfort. Recommended for RSI users and especially for users who need to work with a mouse in front of a computer for a long time. Mouse size: 5.42 x 2.93 x 2.67 inches. Weight: 210g Switch Up to 3 DevicesWith BT 4.0 and 2.4G USB dual connection modes, this ergonomic bluetooth mouse can connect to 3 different devices. easily switching by the click of a mode switch button, compatible with Windows 8, Windows 10, Mac Os X 10.12 or later, Android 4.3 or later 930mAh Rechargeable BatteryBuilt-in 930mAh Li-ion battery, The vertical mouse is recharged via the included Type-C cable. after 5 minutes of non-operation Enter auto-sleep mode to save power, move the mouse to wake up. Low battery indicator will remind you to charge when the red light flashes 4 RGB Lighting Mode4 different RGB lighting effects can be switched with a single button. Note: RGB backlighting can also be turned off by long preing the light button for 3 seconds, which saves battery power for the mouse Adjustable DPI and ConvenientThe whisper-quiet clicks help you focus on what's important. Forward/backward buttons provide convenience when browsing the web; 3-level DPI (800/1200/1600) provide higher sensitivity than standard ergo mice for precise optical tracking ERGONOMIC VERTICAL DESIGN RGB Wirele Ergonomic Mouse (2.4G USB+Bluetooth+Bluetooth) What Included 1 x Wirele Mouse 1 x Type-C charging cable 1 x User manual 1 x USB receiver