After a full charge of about 7 hours, it can be used cordless for about 10 minutes. For adjusting the cutting length, please slide the attachment by hand while turning the dial. - Brand: Philips - Model Name: QC5572/15 - Accessories: 2 attachments, charger Easy self-haircut, even on the back of your head This Philips self-hair clipper features a unique 180º rotating head, allowing you to easily style hard-to-reach areas, ensuring a consistently even cut at the desired length. 180° rotating head Stainless steel blades 11 length settings Easily adjust the length in 13 steps from 0.5 to 15mm Simply turn the integrated zoom wheel located under the cutter head to select and lock in your desired length. The two combs allow for precise adjustments in 2mm increments from 1mm to 15mm. You can achieve a buzz style with the dedicated comb, or a close shave of 0.5mm without a comb. Thank you.