YUMQUA Y-10W 2.4 GHz Portable Finger Handheld Wireless Ambidextrous Trackball Mouse for Carpal Tunnel Left/Right Handed Users(Black) Laptop Lovers

• Y-10W Wireless Trackball Mouse Free replacement and after sale service available, please buy with confidence.
• Interface PS/2 or USB
• All the mouse we sell have 3 months warranty
• Effective distance within 10M.
• Wireless Handheld Trackball Mouse can greatly ease the harm of palm joint or muscle for long time using mouse

Description: Wireless handheld mouse design, off-table use, no operating space restriction, which is also suitable and convenient for living room multimedia center, convenient button controls let you able to operate when you'er sitting, leaning, lying down or other body posture. Specific: 1, Left and right hand design 2, Works with ALL operating systems, including Apple 3, Interface PS/2 or USB. 4, Resolution 1200dpi. *Four group adjust DPI:400,600,800,1200 5, Effective distance within 10M. 6,Working Frequency 2.4GHz. 7, Help prevent Musculo-Skeletal Disorders Notice: Works with Windows version / ME / 2000 / XP /NT/WIN7/WIN10 operating systems, including MAC OS,Android OS, tablet. Package Included: 1 X Wireless Finger Handheld USB Mouse Mice Trackball Mouse 1 X receiver 1 X introduction book 1 X AAA battery FA & Q 1, All the mouse we sell have 3 months warranty, if you had any questions, please contact the seller(in the package) directly instead of Amazon customer service. 2,If the mouse movement becomes difficult, you may try to used some liquid wax to wiping it. Problem solved!