Perhaps this second-generation callus shaver is your most powerful electric foot file. We upgraded its motor. Its actual output speed is from 500 rpm to 1200 rpm, making it faster and stronger. , more efficient. Multi-speed adjustable, you can easily set different levels of speed through the speed controller, which is better than others (they only offer two levels of speed). Not battery powered, no need to worry about running out of battery again, just plug it into the socket and use it directly. Replaceable sandpaper discs, strong self-adhesive ability, easy to apply and remove, one disc per person, healthier, very suitable for home use in nail salons. Stylish appearance, aluminum alloy shell, beautifully polished, just like a small flashlight, portable and lightweight. Key Features: This is the second generation electric callus removal machine: it becomes faster and stronger, rotates 360 degrees, and removes cracked, dry, dead skin, and calluses from your heels more easily. Multi-speed adjustable - you can easily set various speeds, fast or slow as you decide, and enjoy the fun of foot massage and spa. No battery required, just plug in and use, which is more convenient. Replaceable sandpaper pads - one plate per person, you can easily stick it on the machine and take it off, safer and healthier, perfect for home use in nail salons. Stylish appearance - Aluminum alloy shell, beautifully polished, just like a small flashlight, convenient for you to carry when traveling or vacationing. Packing list: 1 x Black electric callus remover (upgraded version) 1 x Replacement sandpaper disc in box (60 pieces) 1 x User manual 1 x Plug with speed controller Please note: This electric callus remover is not waterproof. Specifications: Rated voltage: DC 24 V, rated current: 1.5 A Actual output speed range: 0-1200 rpm Electronic foot file dimensions: 4.56x1.69 inches Electronic foot file weight: 5.99 ounces. how to use? Step 1: Soak your feet in warm water for 20-30 minutes to soften the dead skin on your feet. (Please do not skip this step) Step 2. Tear off the protective film of the sandpaper disc and stick it on the machine. Step 3, connect the power cord and plug it into the outlet. Step four, turn on the switch and adjust the appropriate speed you need. Step 5. Apply appropriate pressure during operation to easily remove dead skin, hard skin, cracked skin, etc. Step 6. After use, take out the sandpaper disc and clean the machine with a dry cloth. Please note that this unit is not waterproof.