The ProtoArc EM03 NL Ergonomic Rechargeable Wireless Trackball Mouse in Gray offers a unique and comfortable trackball experience for users. With Bluetooth and 2.4G connectivity options, this mouse provides versatility in how it can be connected to devices. Its ergonomic design and rechargeable feature make it convenient for extended use. The optical tracking method ensures precise and smooth cursor movement, while the 1-year manufacturer warranty ensures peace of mind. Perfect for those looking for a reliable and efficient mouse with a modern twist on a classic trackball design.