AS810SD Strip-Cut Paper,8-Sheet

Q: what is its operating voltage, 110V, 120V, 220V or 240V ?

My understanding is that it is 120V. I did check the specifications and it does confirm the 120V. I am not certain if they make this shredder in other voltage levels for sale outside of the USA. I would check with the manufacturer for further questions.Phone: Customer service center from 8 a.m. to 5 p.m. (PST), Monday to Friday * Toll-free phone (USA only): 1-800-327-8508* International only: 1-310-793-5650

Q: can I order just the shredder and if so how do I do that?

This unit gives you the option of using basket that comes with it or different basket.

Q: It looks like my old one. Does this one have an extendable width--it appears to have that kind of side.

Yes the the shredder does expand to fit a larger basket. I've had good luck with mine.

Q: Is the shredder that comes with a wastebasket also adjustable to fit other baskets?

Mine is model AS800SD and it has an extendable arm that is adjustable to I believe 15". I had an extra large kitchen trashcan I wasn't using and put this sideways (front-to-back) across the top instead of left-to-right and it fits and works perfectly!! Of course I put the trash bag in the trashcan first so all I have to do is take off the shredder and take out the trash! No cleaning the basket/trashcan of all that paper dust and debris!