Other FeaturesGet a perfect yet protective trim, time after time. The trimmer's steel blades lightly brush against one another, sharpening themselves as they trim so they stay extra sharp and effective as on day 1,Charge your trimmer for 8 hours with your USB cable to get 60 minutes of cordless use,his beard trimmer comes with a USB cable for more flexible charging via your computer or any USB adaptor. The adaptor is not included (recommended adaptor Philips HQ80).