USB transmitter into the computer, the battery in the mouse before you go? Yes, installation is simple. Unfortunately my battery does not fit 100% into the slot and you have to help a little. Even taking out is difficult. One star deduction. Otherwise, the mouse is quite ok processing is mediocre to good. For less than 15 euros you can buy.
Updated on 09.05.2015: So I say the mouse is now in daily use and I have ... which is really very good. The pressure points are pleasant, you is great in the hand and is gradually to my favorite mouse.