[2-Year Battery Life] While the mouse will enter smart sleep mode after 8 minutes of standby lengthens the battery life (No Include Battery).It's also small enough to fit into most laptop bags or briefcases. You can store the included nano-transceiver inside the mouse when it’s not in use, and and also can be plugged into a USB-A port. So you don't accidentally lose it while traveling. [Work Efficiently] 2 DPI (800/1200) adjustable sensitivities for daily business needs; 2 side buttons make it easy to flip pages; The effective transmission distance is 15m which can easily control the conference room screen. [High Precision Work] 3 adjustable DPI sensitivities (1600/2000/2400 DPI) particularly suitable also for those who work with graphics, editing, word processor and other office software programs; 5 million times typing test makes strong durability; The higher 125Hz & 250Hz polling rate can reduce the delay. [Use Without Fatigue for Many Hours] This lighter wireless mouse (72.6g) and with an even more stable base: glides perfectly on the desk. The comfortable curved structure and hand rest make the tendons and muscles of our forearm less strained. [TruWave Precision] Uses TruWave Technology for precise cursor control, it is smart on many types of surfaces. Compatible with Windows 10/8/7, Windows XP, Vista, Mac OS. With good quality, this product is welcomed by the European, Japanese and American markets.