The model of trimmer is cordless, waterproof and can be charged with the included wireless charging station. Also included are two adjustable comb attachments for 3, 6, 10 and 13 mm hair lengths that will give you an even result no matter what length you choose. Plus, The Lawn Mower 4.0's rust-resistant ceramic blade is replaceable and simply clicks into place. This contributes to optimal hygiene and constant sharpness.