Do you have to turn it off when finished? If so, how?

You don't have to turn it off but you can to save battery life. To turn it off turn it over, there is an on/off switch on the bottom of the mouse,

How long is the mouse? Would like to use it for a laptop an don't want a full-sized mouse. I have another one that's only 4" from front to back.

It's approx. 3 7/8" long by 2 1/4" (approximate because it is an irregular shape, and should be no more than a 1/16" off) Should do the trick for you. I use it for my laptop and love it! I hope this helps :)

Battery Average Life	12 months
Compatible Devices	Laptop, Personal Computer
Color Name	gray
Batteries Included	Yes
Batteries Required	Yes
Brand	Logitech
Manufacturer	Logitech
Item Model Number	910-003888
Included Components	1 AA battery is pre-installed, M185 Mouse, USB receiver, User Manual
Operating System	Windows 7, Windows Vista, Windows XP, mac os x
Special Features	Compact, Wireless
Connectivity Technology	USB
Size	One Size
Product Dimensions	3.91 x 5.99 x 9.91 cm; 75.12 g
Item Weight	2.65 Ounces

Logitech M185 ????????

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