In the new trend, there is no alternative of a beard trimmer today.
If you get more than a beard trimmer in a device, it is called multigrooming kit.
The Philips Norelco Multigroom 5000 is the top listed beard and hair grooming kit on the market.
This device may full fill your all grooming needs by itself. With lots of grooming attachments, this trimmer provides an all-in-one grooming facility for men.