Logitech M570 Wireless Trackball Mouse (Discontinued by Manufacturer)
Brand: Logitech
Trackball comfort: sculpted shape supports your hand and stays in one place—move the cursor without moving your arm
Work and play anywhere: Get smooth, precise cursor control wherever you use your trackball—your desk, couch, even your bed
Long battery life: Go for up to 18 months without changing the included AA battery* (*battery Life may vary based on user and computing conditions)
For Windows or Mac OS: robust 2.4 GHz wireless connection lets you control your laptop, desktop computer or home theater PC wirelessly from up to 30 ft. Away
Trackball comfort: sculpted shape supports your hand and stays in one place—move the cursor without moving your arm