Rii RM902 is designed for light-working staff.

Rechargeable: Built-in rechargeable battery, no need change battery.
Silm & Portable: About 4.4 x 2.25 x 1.05 inch,, Perfect for travelling carry and it can be easily put into your laptop bag and ultra-space saving.
Adjustable DPI:800/1200/1600 DPI resolution optical tracking technology gives you sensitivity and precision on a variety of surfaces
Silent Click:The Quiet mouse design provides low noise clicks, reducing the sound of clicks by 80 percent compared to using a traditional mouse
Wireless connection 2.4GHz. Stable transmission distance up to 10 meters. Plug and play, no lag or delay. (The USB receiver has a storage compartment at the bottom of the mouse)