Functional, very bright, very handy

The housing is very comfortable to hold, and the laser is extremely bright. You can use it in full sun light up the neighboring house wall and still sees the green dot. At night, good for the green line in the air for explaining constellations. It is very handy to be able to accommodate the USB receiver in the device. Thus nothing flying around and nothing is lost. The buttons could be a bit bigger. Two effects are disturbing: The point comes when pressed only with weak brightness to about 1 second later fully light up (but then really fat!). Pressing the laser longer diminishes its brightness. Is probably due to the internal heat generation. After almost ten years, with a red 670 nm Presenter Mouse the green 532 nm laser is a real coup in terms of brightness. Conclusion: Again good job by Logitech! Swiss product just ...