With this product you can both shave and trim your beard. It has a battery life of 40 minutes.
From OnBuy
Gillette Fusion ProGlide Styler 3-in-1 Waterproof Trimmer for Man, Achieve Any Facial Hair Style with Three Exchangeable Combs (2 mm, 4 mm, 6 mm)
House of Fraser
Gillette Gillette Fusion All Purpo - Black
This product is also available at 1 unverified store.