ECOiNVA Wireless Car Mouse, Laptop Desktop Mouse, PC Office Computer Mouse for MD (Grey)
Specifications: Power supply: approx. 2 x AAA batteries (not included) Size: approx. 11.5 x 5.2 x 3.4 cm. Net weight: approx. 70g Button: 2 buttons with scroll wheel. Most suitable for laptop and PC users. Wireless technology works on most surfaces. Effective: 2.4GHz wireless transmission up to 10 meters range.