The "EX-G" series of non-gripping mice, developed in collaboration with an orthopedic surgeon, allows for use while maintaining a natural hand shape. This Bluetooth(R) 5-button mouse focuses on the muscles that move the wrist and fingers, minimizing physical strain when moving the mouse. Silent click Non-gripping mouse Bluetooth type Antibacterial treatment Purchased in September 2024 Used a few times, but I'm selling it because I've decided to use something else. Power source... Battery-powered Connection type... Wireless (Bluetooth) ELECOM EX-G Wireless Mouse Bluetooth Silent S Size 5-button Multi-pairing "AskDoctors Evaluation Service" Certified Antibacterial Black M-XGS30BBSKBK No box Price not negotiable Thank you.