ADJUSTABLE SPEED: There is a separate speed controller with a variety of speeds to choose from with the flick of a button. PLEASE NOTE: The speed range is 0-600 rpm, you may find it slow but it is a safe speed and has enough power. If the speed is too fast, the machine can easily hurt our feet. Please understand this. WON'T HURT OUR FEET: During operation, we need to apply proper pressure to the machine and it will rotate slowly and gently remove the dead skin on our feet. NO BATTERY: No need to recharge, just plug it into the socket and use it immediately, no need to worry about running out of power anymore. REPLACEABLE SANDING PADS: After use, you can replace the sanding pads with new ones for others to avoid foot infections, one person, one pad, healthier, and our self-adhesive sanding pads are easy to attach and remove. EXCELLENT APPEARANCE: Aluminium alloy shell, beautifully polished, perfect gift for wives, mothers, girlfriends and female friends.