Good alternative to the Trackball Explorer !!!

I have longed Kensington trackball Very cheap shot me right from Amazon as soon as it was available.
I searched for quite a while for a suitable replacement for my Microsoft Explorer as the is no longer manufactured for a couple of years. And if you should still get a new one at auction portal, then only for a lot of money.
I had only thought of the Logitech Cordless TrackMan, but the huge receiver, the obsolete radio technology and a range of max. 2 meters according to the manufacturer has dissuaded me from quickly the part to buy.

A driver is unnecessary as Windows detects and installs him readily. The settings can be done with the Windows own driver. Only the key assignment is not so. But is also unnecessary with only 2 buttons.
The build quality is good. The ball is suitable in size and runs very easily. For cleaning purposes easy rausdrücken the ball from the bottom and make the bowl clean with a cloth. As with the Explorer. The keys are a little getting used to because the mouse is not very ergonomic. But after a while it's no longer a problem. But they are very smooth and good size.
But the biggest selling point was a trackball that works with the latest 2.4GHz wireless technology and can be operated with your index / middle finger. The trackball is equally suited for right and left-handers.
The range specified by the manufacturer of 10 meters is probably not very realistic. But 4 meters (even when the battery) is a good value. Thanks to the on / off switch, the batteries can be good save.
The scroll function is also really great. Virtually no wear thanks sensors.

The small receiver can be easily stowed in the battery compartment when you are going with times when traveling. "Practical"
I use it now for over three months and he works as the first day. At the time of Kensington is the best alternative for me and it works really well. Especially while gambling in front of large flat screen TV, there is my hand, no complaints.

Update:

After about 5 months now, there are already a few slight deficits at 2.8 meters. I had the distance to 2.4 meters with a decreasing extension. Now it's back.
I think that's still a good value. My Eclipse Wireless LiteTouch Keyboard I had almost every 2 days Charging.

My conclusion after 5 months:

+ Good range
+ Very good workmanship
+ Easy to clean
+ Innovative Scroll function
+ Good price / performance ratio
- Unfortunately only 2 buttons
- No USB charging port
- Not quite optimal ergonomics

Greeting Schnupfer