Features: 
2.4G transmission, 10m transmission distance, stable and .
Powerful optical engine provides accurate click, quick response and stable signal.
3 adjustable DPI(1000-1600-2400DPI), easy to switch, adapt to a wide of material surfaces, accurate and reliable position, meet your daily office and gaming needs.
Ergonomic design, the vertical type fits the and fingers, reduces discomfort when using, bid farewell to the " hand".
Equipped with USB receiver, and , convenient to use.

Specification:
Brand:  
Model: F-17
Button number:6
Tracking system: Optical
Connection mode: 2.4G
Effective distance: 10m
DPI: 1000-1600-2400DPI
Frequency: 2405MHz-2476MHz
Button : 3 million times
Roller : 1.2 million times
: 1*AA ( not included)
Working voltage/current: 3V/4mA
Supported system: 2000/ME/XP(64bit)//Win7/Win8/ OS X(over V10.4)
Item size: 13.4 * 9.6 * 8.3cm /5.28 * 3.78 * 3.27in
Item weight: Approx. 100g /3.53oz

Packing list:
1 *                                                                     
1 * USB receiver
1 * User manual