Norelco Philips Series 9000, Ultimate Precision Beard and Hair Trimmer with Beard Sense Technology For An Even Trim, BT9810/40

Great product. Very durable.

The really killer feature of this beard trimmer (which doesn't seem to be advertised well imo) is that it it doesn't miss a bunch of hairs like most trimmers do. The adjustable "built-in metal comb" guides the hairs directly into the blades, since it's the same piece of metal that the blades cut against. This is very different from a trimmer with a plastic comb/spacer, which will sort of lift the hairs but then drop them before they reach the blades, allowing them to curl away and avoid being cut. With this trimmer, you no longer need to do several passes to ensure you haven't missed any hairs. I've included a picture with the comb/spacer fully extended so you can see what I mean. Note: it might not be quite as effective if you use the plastic spacer (for lengths greater than 5mm), although I expect it would still work quite a bit better than other trimmers.