Has trimmer-type blades on both sides of the foil shaver, which mow down the hairs before the foil-type shaver attacks the stubble. Waterproof, can be used in the shower. Rechargeable. Replacement blade/foil kit is available

Sealed unit, batteries are not replaceable. Needs to be carefully placed in the stand to contact the charging pins; there is a light on the wall wart (not the stand) that lights when it is charging, but you need to be able to see it to confirm it is...