2 VERIFONE Omni 3750 5100 Credit Card Machines
2 Verifone credit card machines, 1 model Omni 3750, 1 is Omni 5100. Include power adapters, phone jack cables. I just plug the power on both. That is as far as I can test. But you can return them within 30 days at your own cost if you find them not compatible, or not working.