1The RPM range of the electric miniature engraving pen is 50001000018000 three gears (RPM value per minute), which can easily control the engraving/drawing path. Generally, the speed of metal and wood is lower, and the speed of glass and ceramics is faster. 2You can hold it easily and comfortably, just like a pen, you can perform complex tasks without excessive pressure on your wrist or hand. 3This DIY vibration carving tool set is suitable for metal, glass, nails, plastic, wood, leather, etc. 4It can be charged to 80% in 30 minutes and can be fully charged in 60 minutes, which is fast and convenient. 5Establish compliance with standard specifications and strictly follow factory quality control. Item Type: Electric Micro Engraver Pen Set Material: Aluminium Alloy Color: Rose Gold Applicable Grinding Head Shank Diameter: Approx. 3mm/0.1in Chuck Depth: Approx. 25mm/1in Speed: 5000-10000-18000 Three gear Power: 10W Battery Voltage: 4.2V Battery Capacity: 300mAh Battery Type: Lithium battery (Built-in) Use Time: Three gears no-load operation for more than 1 hour, if you need to use for a long time, you can use it while charging. Charging: 30 minutes can be charged to 80%, 60 minutes can be fully charged. Charging Port: Using TYPE-C, the same as the charging port for Android smartphone 1 x Host 1 x Hex Wrench 1 x USB Data Cable 16 x Matte Sheet 13 x Grinding Needle 5 x Sponge