After nervously accepting credit cards at shows without running
transactions real-time, I ended up getting a wireless processing
machine called LinkPoint 9000. I bought it on e-Bay for about $500.
It is critical to check with your service to verify what
devices/technologies are compatible with their systems.
I was surprised to learn that this device does not use cellular
technology, but uses radio waves. There is a Web site that shows
coverage areas. In most metropolitan areas the signal is strong
enough for the device to work indoors. In remote rural areas,
coverage may be an issue.
There is a newer model of LinkPoint out now, but this machine still
works fine. I'm not doing shows any more... if anyone is interested
in taking this unit off my hands, I will consider offers!
All the best,
Charlotte, NC (USA)