Panasonic ER-GB40-S Hair & Beard Trimmer for $29.99 shipped.  Here is a screenshot for your reference.  This trimmer has an adjustable dial with nineteen 0.5 mm settings which eliminate the need for multiple comb attachments. It features nineteen settings from 1-10mm, and is 100% washable and rechargeable.  Most places have it for about $49.