It is powered by 2 x AA batteries, these are not included
The mouse has a Nano receiver (Very convenient for travel) can be stowed in the mouse
There is no on / off switch, which seems to make the mouse automatically
The mouse buttons click audibly (bright clicking sound)
The appearance comes without a red light (Tippe that may be called laser mouse mouse then ;-))
The mouse fits well for medium-sized and small hands
The side buttons (forward / backward) have a very deep / wide pressure point, which I personally do not like very much
The wheel has a rather weak screening (matter of taste)
About the DPI switch you can turn the sampling rate in 3 steps switch
Conclusion: As occasional notebook mouse on the go or sporadic use I find it good, even the price / performance ratio. Those who work daily or several hours with a wireless mouse, which I would advise you to take some extra cash in hand.