| Countertop POS Terminal | Retail stores, restaurants, pharmacies, and fixed checkout counters | 10–15.6 inches | Wi-Fi, Ethernet, optional 4G | External power; designed for continuous use | Chip cards, magnetic stripe cards, contactless cards, QR payments | Usually integrated thermal printer | Large display, stable operation, strong peripheral support, suitable for high transaction volumes | Low mobility and requires a dedicated counter space |
| Portable Smart POS Terminal | Cafés, table-service restaurants, delivery teams, and mobile retailers | 5–8 inches | Wi-Fi, 4G, Bluetooth, sometimes NFC | Rechargeable battery; commonly supports several hours of active use | Chip cards, contactless cards, QR payments, selected mobile wallets | Integrated or optional compact thermal printer | Supports pay-at-table service, queue reduction, and flexible checkout locations | Smaller screen and shorter operating time than countertop equipment |
| Basic Card Payment Terminal | Small shops, market stalls, service counters, and low-volume merchants | 2.4–5 inches | Wi-Fi, cellular network, or dial-up depending on configuration | Battery-powered or external power | Chip cards, magnetic stripe cards, and contactless cards; QR support varies | Usually integrated thermal printer | Simple operation, lower purchase cost, and quick transaction processing | Limited inventory, loyalty, analytics, and staff-management functions |
| Handheld Mobile POS | Outdoor sales, exhibitions, transportation services, and field operations | 4–7 inches | 4G or 5G, Wi-Fi, Bluetooth, and GPS on selected configurations | Rechargeable battery; commonly supports a full working shift with moderate use | Chip cards, contactless cards, QR payments, and mobile wallets | Optional integrated printer or digital receipt delivery | High mobility, cellular independence, and suitability for on-site payments | Battery charging, cellular coverage, and device durability require attention |
| Dual-Screen POS System | Restaurants, hospitality venues, and businesses requiring customer-facing displays | Main screen 10–15.6 inches; customer screen 5–10 inches | Ethernet, Wi-Fi, Bluetooth, and optional cellular connectivity | External power; optional backup battery | Chip cards, contactless cards, QR payments, and supported digital wallets | Integrated printer is common | Improves order confirmation, tip selection, promotional messaging, and payment transparency | Higher equipment cost and larger installation footprint |
| Self-Service Kiosk Terminal | Fast-food outlets, cinemas, hospitals, transport hubs, and unattended services | 15.6–32 inches | Ethernet or Wi-Fi; cellular backup may be available | External power; optional UPS backup | Contactless cards, chip cards, QR payments, and mobile wallets | Receipt printer is optional or integrated depending on the design | Reduces queue pressure and supports self-service ordering or payment | Requires more space, software integration, maintenance, and accessibility planning |
| Unattended Payment Module | Vending machines, parking systems, ticketing, lockers, and automated retail | Small embedded display or no display | Ethernet, cellular, or serial connection to host equipment | External power from the host machine | Contactless cards, chip cards, QR payments, and selected mobile wallets | Usually no printer; digital receipts may be supported | Compact design, 24-hour operation, and minimal staff involvement | Integration, remote monitoring, vandal resistance, and network reliability are critical |