1. More movement, more comfort: ERGO M575S Wireless Trackball Mouse shaped shape, your hand relieves your hand for hours smooth, sensitive monitoring-with silent clicks 2.25 % less musclefall (1): This wireless ergonomic mouse has been developed with wireless laboratory experts. Pre -Pre -Stance (1): The ergonomic shape of ERGO M575s supports your hand and transforms your forearm into a better posture throughout the day; A good harmony for most hand size 4. Work on your way: 3 Experience advanced control with customizable buttons, time -saving shortcuts and intelligent actions; Loggi options+ application (2) Adjust it to your preference with. Accept the 5th area with thumb control: With ERGO M575s, without moving your hand, making it ideal for small or saving installations, and the battery life up to 6. 6. 18 months (AA battery) (3) 7. Recycled plastic: ERGO M575S Bluetooth trackball mouse plastic pieces, certified consumer recycled plastic (graffiti: 52%, off-white: 21%) (4) (4)