Get 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 30 minutes of cordless use. This 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. This trimmer comes with a battery charging indicator which lets you know with a green light that your device is charging. We back this Philips trimmer with a 2 year guarantee our grooming products are built to last. You'll never need to oil it and it's compatible with all worldwide voltages.