With the Wahl Mustache & Beard Trimmer, you can trim your beard wherever and whenever you want, seeing as it runs on 2 AA batteries. This makes it very easy to take with you on holidays or a business trip, and to maintain your beard while there. The 3 stubble combs allow you to shape a short beard. Attach the large comb attachment to the shaver head and get to work on a fuller beard as well. The comb attachments' short teeth also make this beard trimmer suitable for the grooming of your mustache. Drip some oil onto the shaver foils every now and then to keep them running smooth. With the included brush, you can easily remove loose hairs from the blades.