Castle-s4
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Countertop smart terminal with full POS capabilities for fixed-location businesses
The Castle S4 is a countertop smart terminal designed for businesses that process payments from a fixed counter or desk. It runs the TWPayz POS app pre-installed and supports a full range of transaction types including standard purchase, pre-authorisation, MOTO, refund, and void. It connects via Wi-Fi, Ethernet, or Bluetooth and prints receipts on its built-in thermal printer.
🖼 DEVICE PHOTOCastle S4 — front/three-quarter view on white background. No third-party branding visible. Clean product shot.
Guides for This Terminal
| Guide | What it covers |
|---|---|
| What's in the box | Package contents checklist |
| Hardware overview | Screen, card slots, ports, printer, connectors |
| First-time setup | Power up, Wi-Fi, activation |
| Payment methods | Contactless, Chip & PIN, keyed, swipe — all modes explained |
| Transactions | Purchase, pre-auth, keyed entry, MOTO, refund, void |
| Device settings | Gratuity, split billing, refund limits, network, updates |
| Reports | Transaction history and end-of-day reports |
| Print receipts | Receipts, reprinting, paper reload |
| Troubleshooting | Error messages, declined transactions, device issues |
DCC not available: Dynamic Currency Conversion is not available on this terminal through TWPayz. Do not enable or refer to this feature.