Wireless POS Terminal mainly fits for airtime topup, mobile recharge, restaurant online food delivery, lottery, bill payment, bus tickets, mobile payment, etc. Wireless POS Terminal can work with GPRS, SMS, USSD, STK
Mobile GSM SMS Printer is a small printer that looks simple but supports GPRS and SMS. Even though it is without LCD screen, it can support accepting / rejecting orders.
Airtime Vending Machine is the POS that supports reading magnetic cards and sends the data to web server or SMS gateway. This POS is also usually working for airtime topup, bcs it supports USSD mode.
Android Smart POS Terminal, support MSR, smart card and NFC card, with 5MP camera, 4G, 3 G and 2 G network, and Wifi+Bluetooth, with 58mm printer O/S is Android 7.0