Mini Electric Drill Grinder Engraving Pen Speed Tool B1B2

Specifications:Power: 25WVoltage: 3.7VSpeed: 5000-25000r / minClamping Diameter: 2.35mm (Suitable for all 2.35MM specification grinding head, reducing drill etc)Size: Approx. Approx.125x16mm / 4.92x0.63 inch Features:* IMPROVED WIRELESS ELECTRIC GRINDER PEN: This grinding pen comes with rechargeable lithium battery, so you can use it anywhere.* Application: Suitable for all kinds of stone carving, wood carving, olive carving, plastic carving, egg carving, glass carving, ceramic carving, drilling and all kinds of metal surface grinding, engraving, trimming, etc.* 3 speeds: 5,000 to 25,000 RPM output makes the rotary tool more prominent. Three gear selection can apply to different situations precisely, and make your projects easier and more professional.* Dual Usage: Charging and plugging in dual usage, can be connected to the power supply while charging, more efficient.* Power Display: 1 light = 30% power, 2 lights = 31% - 70% power, 3 lights = 71% - 100% power.* Intelligent Overload P