The Philips Norelco Ultimate Premium Precision Beard Trimmer BT9810/40 is a premium beard, hair, and stubble trimmer. Including: Full steel blades and head, sleek and durable steel design; 100% waterproof; 120 minutes of Lithium Ion run time, 30 quick adjustable lengths zoom wheel in 0.2mm increments (0.4mm to 10mm range) and 1 sturdy reinforced guard attachment to get your precise, even, desired length. This trimmer also cuts hair. Steel Premium Beard Trimmer with zoom wheel, 1 reinforced guard attachment, charger, blade oil for a more precise, even trimAdvanced full steel blades and Beard Sense Technology motor are designed to quickly and easily provide a even trim in every pass. The steel head and blades effectively cut each hair preventing skin irritation. The self-sharpening blades will cut more hairs in every pass for faster trimming even on dense hair.Easily spin the quick adjust zoom wheel to lock in 30 length settings at 0.2mm (1/128") increments from 1/64" to 25/64" and get the precise look you want. Includes 1 reinforced guard attachment.Advanced lithium-ion battery delivers maximum power for high performance cutting. Charge your beard trimmer for an 1 hour to get 120 minutes of cordless use with battery light indicator.100% Waterproof for easy use in or out of the shower. 2 year warranty and guarantee.Winner of the 2021 Men’s Health Grooming Award for best all-in-one beard trimmer. Get started with the GroomTribe Styling and Shaving app where you can check out more than 14 different beard styles in real-time AR, discover which one suits you best, and be guided through the stages required to make it a reality.