Wireless M8w Dr. Pen, Cartridges Wireless Derma Roller Skin Care Kit.  Features: 1.One-button Switch, Equipped with Digital Display Gear, Display Gear Speed is More Intuitive 2.Wireless Charging, Built-in 500mAh Battery Capacity, the Longest Working Time Can Reach 4 Hours 3.6 Speed Adjustment, Compared with 5 Speed, the Speed is More Refined, and the Effect of Treating the Problem Skin is Maximized 4.The Needle is Configured with 11 Pins, 16 Pins, 24 Pins, 36 Pins, 42 Pins, Nano Pins, 5.16 Needles Have a Larger Treatment Area and Finer Needles 6.The Needle Adopts Three Interface Modes, and the Triangular Power Transmitter is Designed to Receive More Uniform Force. 7.The Curved Needle Surface Design Can Flatten the Uneven Position of the Skin During the Needle Movement SPECIFICATIONS Number of Pieces: Combo Microneedle Length: 0.25mm Material: Metal Power Source: Rechargeable Battery Power Source: AU Power Source: UK Power Source: EU Power Source: US Use For: Eyebrow Lip Eyeliner Face Needle Type: 11/16/24/36/42/RD Nano/5D/3D/Nano-Wafer Needles Gifts: 6 Pcs Cartridges Kin Care Kit: With Digital Display Input: AC100-240V 50/60HZ Output: 5V 1A Speed Control: 6 Levels Rotating Speed: 15000 -18000rpm Package Included: Wireless M8W Dr. Pen*1 16Pin Needle Cartridage*2 Needle Cartridage*6(you Can Choose 11/16/24/36/42/3D/5D/RD/NanoWafer) USB Cable*1 Adaptor(US/EU/UK/AU)*1 English Instructions*1 Cover*1 Box*1 . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.