Consumer - Epson Picture Mate PM-400
Pros:
Get pro quality photos, fast! print vibrant, 4 x 6 inch photos in as fast as 37 seconds.
Portable printing grab the handle and take Picture Mate Charm to parties, events and etc...
Smudge, scratch, water and fade resistant prints mean durable photos that last longer than traditional, film-processed photo
Print wirelessly from iPad.
Cons:
While the Epson printer is the most portable photo printer, you'll find yourself changing photo paper and ink very frequently. I would stay away from using at big events with over 100 guests or if you're doing photo booths professionally or frequently.
Professional - DNP Printer
DNP RX620, DNP RX1HS or DNP QW410
We highly recommend all DNP printers as they have been proven to be very reliable and are the most used in the industry.
Pros:
Aimed at portable on-site Event Photography use, weighing only 30 pounds
Impressive high-volume output with 700, 4”x6” print capacity
Print sizes of 2”x6”*, 4”x6” and 6”x8” (prints 5x7"** on 6x8 media)
Warranty: 1 Year DNP RX1 Parts and Labor Warranty or 30,000 print
Cons:
You're only limited to 4x6 or 6x8 media size
No Airprint built-in option. If using LumaBooth, requires LumaBooth Assistant or other AirPrint solution.