I have been using this Wahl beard trimmer for a few months. Originally paid around $49 and would happily pay that again, retails around the $50 mark (currently at TGG). At this price it's a steal. I've been through a few over the years but this is great quality.
Would probably work on your head if you had very short hair. Cannot comment to that performance.
Description
Wahl WA9918-4212 Beard & Stubble Trimmer
9 trimming lengths, cord/cordless & rechargeable, 60 minute run time and precision self-sharpening blades
Thanks mod. Sorry was trying to fix the picture.