What type of battery does it take?

looks like AAA, but I do not recommend this mouse it di not work for me at all, cursor bounces all over the place, had to remove and use a different one

Are the side buttons programmable?

They are not programmable on the mouse itself, they will have to be set up on your operating system control panel for the desired actions.

Questions & Answers: Kensington K72422AM Ruby Red RF Wireless Optical Mouse

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Item#: N82E16826125170
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Kensington K72422AM Ruby Red 1 x Wheel RF Wireless Optical Mouse

1 x Wheel
RF Wireless
Optical

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