Smart Polishing Pen with Multiple Sanding Heads Wireless Speed Adjustable CPU Flash Screen Drilling Chip IC Grinding Disassembly Tools GDR1 Polishing Grinding Pen Features: 1. Comfortable hold, three speeds shift, multi-tool/chip protection. 2. Weightless, unrivaled lightness, and compactness; One-Piece metal, smooth yet comfortable hold; Minimal styling, craftsmanship made for polish. 3. High concentricity, pen shape sesign, tap switch, smooth motor, type-c sharging. 4. Multiple sanding heads easy to install, plug-pull, easy switch, collet design, universal fit for 2.35mm shank, diameter grinding heads. 5. Adopts Type-C charging port, built-in 1000 mAh battery, 4 hours continuous operation, DC 3.6V voltage, 37000 Rpm/Min rotating speed, 2.32mm diameter. 6. When the motor rotates, the resistance met by the motor is too large, the motor load red light flashes, continuously loads for about 5 seconds then the motor enters the automatic shutdown protection function. GDR1 Polishing Grinding Pen Features: 1. Comfortable hold, three speeds shift, multi-tool/chip protection. 2. Weightless, unrivaled lightness, and compactness; One-Piece metal, smooth yet comfortable hold; Minimal styling, craftsmanship made for polish. 3. High concentricity, pen shape sesign, tap switch, smooth motor, type-c sharging. 4. Multiple sanding heads easy to install, plug-pull, easy switch, collet design, universal fit for 2.35mm shank, diameter grinding heads. 5. Adopts Type-C charging port, built-in 1000 mAh battery, 4 hours continuous operation, DC 3.6V voltage, 37000 Rpm/Min rotating speed, 2.32mm diameter. Color: As shown Material: plastic Package Contents: 1x electric mobile phone chip polishing pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.