Microsoft Sculpt Ergonomic Mouse Flashing Red Light

Bright white light is very bright. Red/red-flashing light is cool -- not sure if I'll ever use it. Good fit and balance (with batteries in back). Lightweight and comfortable. Looks suitably geeky. Very happy with my purchase.

Home use. Great ergonomic mouse!

This is a very comfortable and ergonomic mouse pad.

This is a very nice headlamp, without two levels of white light, a red light and a flashing red light.  Having the battery pack on the back makes it much easier to balance and the straps are adjustable over a wide range.

My APC UPS sounded off every few hours with beeps and a flashing red light to let me know it was time to replace the battery. I ordered online and the battery arrived sooner than expected. I installed it and it's been working fine since. The part I especially like, I didn't have to shut everything off to install.

great price and works great, better than Microsoft mouse

I've been using the Microsoft Natural Ergonomic Keyboard (4000?) for years. I've found that I need to see the keys more often and thought the old keyboard quite large. While looking for low-vision keyboards I found this illuminated model. I thought I'd never adapt to or like a flat keyboard like this but I was so wrong. This is the best keyboard I've ever used. Easy strike, silent, and I can see the keys without bright room lighting -- even without my glasses! A full numbers layout, easy extra function keys, great configuration, easy setup, and a sophisticated appearance. Love it. Highly recommended for everyone at all skill levels.

but it is unsettling to have the upstream light flashing

This is a great, easy to use mouse. I've used various Microsoft Mouse types through the years and this is the same, good, high quality.

Mouse is one of the modern instruments most of us use most during the day, and incredibly enough not much thought in terms of ergonomic design is given by manufacturers. This mouse is excellent. I used to have minor pains after prolonged usage, until I found this mouse.. Hope more manufactures start giving more serious thoughts to mouses. I know the price is high, but how much is a healthy right hand / arm worth?