Model: 6410 Color: Black + Red Material: Plastic 2.4GHz wireless transmission technology Effective range: 10 meters Support Plug and Play Standard 85 keys Operatig voltage: 2.2~3.0V Rated current: 300mA Life cycle: 5000000 times Battery: 2 x AAA batteries (included) Supports system: Windows OS & Mac & Linux Package includes: 1 x Wireless Keyboard 2 x AAA batteries 1 x Receiver Keyboard Dimensions: 26 x 12.5 x 1.5cm, Weight: 261g Package Dimensions: 28.5 x 13.7 x 3cm, Weight: 353g