Lightweight body, comfortable and non-slip feel, operate more closely to the palm of the hand. Pure copper precision core, clamping tight, carving more energy and safety. Pure copper core motor, stable operation, strong conductivity, high temperature resistance. Upgraded power built-in lithium battery, to ensure continuous and stable operation. Up to 20 kinds of replaceable cutter heads, meet the needs of the unused, wider range of applications. Specification: Product Name: Woodworking Electric Engraving Machine Model: TP-188 Rated voltage: 4.2V Power: 40W Charging interface: USB (Type-C) Speed: 15000RPM Product Size: 196x37MM Product weight: 236G Colour: Material:plastic Package Contents: 1 x Electric Engraving Machine 1 x Tool storage box 1 x Small Wrench 1 x Sharpening Stone 1 x Copper Collet 1 x USB Charging Cable 20 x Replaceable Cutter Heads 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.