High responsiveness: Adjustable 800/1200/1600DPI optical wireless pen mouse, regardless of whether there is a mouse pad, can achieve precise optical tracking and smooth motion control.$ Easy to use: "Plug and Play", no need to install additional drivers. The 2.4GHz wireless mouse has an effective distance of up to 10m.$ Support different devices: use type c OTG adapter and Micro usb OTG adapter, not only for computers, but also for any tablet and mobile phones with micro usb or type C ports.$ Multi-scene use: The digital pen mouse is suitable for beginners to draw on tablets and computers or use photo editors. It can be put in your pocket and taken to classes, ppt presentations and business meetings.$ Compatible system: suitable for Windows7 / 8/10 / Vista / XP / 2000, Linux, Mac OS, Android OS. Tip: When the battery power is low, the low voltage alarm will light up to remind you that the battery needs to be replaced. Battery: 1 x AAA battery (not included)