Model number M8-A(plug-in type) M8-B(wireless & rechargeable) Speed level 6 levels Needle length 0-2.5mm Needle cartridge Comes with 2pcs of 16pins Adapter 5V-1000mA Battery capacity(rechargeable model) 500mA Gross weight 312g Packing size 16.9*12.3*5.6cm
