Bluetooth allows for quick, direct printing from your smart phone or tablet, and it's also compatible with Apple Airprint for seamless integration with iOS devices. You can still connect wired devices via USB in trusty traditional fashion of course.
eBay
Revopoint POP 3 PLUS 3D Scanner For 3D Printer 0.04mm Precision 18fps Speed Handheld Scanner Standard Medium Object 3D Scanner
Aliexpress UK
HP DeskJet Wireless Printer Scanner A4 7.5ppm Mobile Printing Eco-Friendly.
eBay
14 Inch Cheap Android System Cash Register Pos Machine with Bluetooth Scanner Printer Money Box for Supermarket HS-A14
Aliexpress UK
HP DeskJet Wireless Printer Scanner Copier A4 7.5ppm Black Colour Mobile Print.
eBay
A complete set of cash register equipment 80mm thermal printer scanner cash drawer touch cash register 15.1 inch built-in WIFI
Aliexpress UK
HP DeskJet 4220e Printer Scanner Copier All in One Colour Wireless Airprint.
eBay
14 Inch Cash Register for Business Win 10 Pos System i5 8G 128G with 58mm Thermal Printer Scanner and Cash Box
Aliexpress UK
Canon MG2550S or MG2551S All-in-One Inkjet Printer USB only NON Wireless. Model MG2550s. Extend Printer Technology Inkjet. Technology Inkjet. Printer Type All-in-One Printer. Output Type Colour. Key Features.
eBay
laptop Window10 or Android POS System Cash Register Machine 15inch WITH Scanner Build in WIFI 58mm thermal printer Cash Drawer
Aliexpress UK
HP DeskJet 2820e All-In-One Printer For Home Print Copy Scan Scan To PDF.
eBay
Faith Online inkjet Printer Connect Computer and Scanner Print Variable Data Barcodes High-precision Inkjet Printer
Aliexpress UK
Canon Wireless Printer Scanner Copier Compact Duplex A4 Borderless MG3650S.
eBay
Color Print Head Print Head Color for IP7220 IP7250 MG5420 MG5450 Printers Scanners Accessories QY6‑0082 Print Head for IP7220
Aliexpress UK
HP DeskJet Wireless Printer Compact Easy Print Scan Copy No Ink Included.
eBay
10 Inch Android System Tablet POS Cash Register with 80mm Printer, Bluetooth Scanner for Retail, Restaurant
Aliexpress UK