High-concerned chemical: None - Ensuring a safe and environmentally friendly user experience, this trackball mouse is free from harmful chemicals, making it suitable for prolonged use without health concerns.Power Type: Rechargeable - Equipped with a rechargeable battery, this mouse offers convenience and cost-efficiency. You can easily charge it using a USB cable, eliminating the need for constant battery replacements.Number of Rollers: 1 - The single roller design enhances precision and control, allowing for smoother navigation and better handling of the mouse during intense gaming sessions or detailed graphic design work.Hand Orientation: Right - Specifically designed for right-handed users, this ergonomic mouse reduces wrist strain and maximizes comfort, making it ideal for long hours of use in any professional or gaming environment.Description:Experience seamless cursor control without the need to move your arm with our ergonomic trackball mouse. Designed for comfort and efficiency, it features a smooth, precision trackball controlled by your thumb, significantly reducing wrist and arm fatigue. Enjoy the flexibility of dual connectivity with Bluetooth 4.0 and 2.4G wireless options, allowing you to connect up to three devices simultaneously and switch effortlessly between them.Features:Smooth and precise trackball for hand-free cursor movementDual connectivity with Bluetooth and 2.4G wireless optionsErgonomic design to minimize hand fatigueHigh sensitivity with three adjustable DPI levels (800/1000/1600)Rechargeable via USB-C portSupports connection with up to three devices simultaneouslySpecifications:Working distance: 10mDPI levels: 800/1000/1600Click life: over 3 million timesTrackball diameter: approximately 3.2cmColor: As ShownMaterial: plasticPackage Contents:1 Wireless Trackball Mouse