Criteria for purchasing a film scanner or a scanner with transparency unit: description of the purchase criteria, evaluation of the producer data and data sheets
VisionTek 65W Charger - GaN II Power Adapter - 2 Port – VisionTek.com
Accessory: 5V 3A Power Adapter | Azulle
Epson 3170 Scanner Lid Transparency Unit Film Adapter | eBay
Best Buy: HP Scanjet Flatbed Photo Scanner with Transparency Adapter SCANJETG4010
Epson Transparency Adapter B813202 B&H Photo Video
Using the Transparency Unit
Transparency Unit for 12000XL/13000XL Scanners | Products | Epson US