Electric shavers and beard trimmers from Philips, Wahl and Black & Decker. For the wider range including women's hair removal, see Shaving & Hair Removal.
Wet-and-dry models let you shave in the shower with foam, which is gentler on skin that reacts to dry shaving. If you get irritation, that is the first thing to change.
Check the battery specification in minutes of shaving, not hours of standby, and whether it will run while plugged in — some will not, which matters if you travel and forget the charger.
For beards, a trimmer with a proper adjustable guard beats a shaver with a clip-on comb. If you maintain a specific length, buy for the guard.