With an inbuilt 58mm Seiko thermal printer, P2 delivers excellent printing quality smoothly and swiftly. High-speed Printing P2 is equipped with a UnionPay certified front camera for facial recognition payment and a rear camera for QR code payment. Front and Rear Cameras The removable LiPo battery offers higher flexibility for multi-shift operations. 
 
https://www.sunmi.com/en-US/p2/