Learn about the different devices that we offer for POS+.
We support four different types of devices:
- Portable: a compact, battery-powered payment terminal that can be deployed in mobile or temporary locations, allowing for self-service transactions without fixed infrastructure. Ideal for events, food trucks, or temporary retail installations.
- Mobile: a flexible terminal to accept payments wherever your business takes you. Ideal for small merchants and mobile payment scenarios like taxis, delivery services, outdoor vendors, and more.
- Countertop: a stationary terminal designed to sit on a checkout counter or desk. Ideal for businesses that conduct transactions from a fixed location, such as traditional retail stores.
- Unattended: a self-service payment terminal that allows customers to complete transactions independently, without the need for staff intervention. Ideal for vending machines, self-service kiosks, and automated fuel pumps.
Each device comes with the PXP application already installed.
The following table describes the specifications of each device.
While we strive to keep our product specification table up to date, we recommend that you check Castles' site for the most current details.
| Castles S1F2 | Castles S1F4 PRO | Castles S1P2 | Castles S1U2-M4 Coming soon | |
|---|---|---|---|---|
| Type | Portable | Portable | Countertop | Unattended |
| OS | Android 10 | Android 13 | Android 13 | Android 13 |
| PCI | PTS 6.x | PTS 6.x | PTS 6.x | PTS 6.x |
| Features | Printer PIN on glass Keypad Camera | Printer PIN on glass Keypad Camera | Printer PIN on glass Keypad Camera | Printer PIN on glass Keypad Camera |
| Connectivity | 2G 3G 4G LTE GPRS Wi-Fi Ethernet Bluetooth | 2G 3G 4G LTE GPRS Wi-Fi Ethernet Bluetooth | 2G 3G 4G LTE GPRS Wi-Fi Ethernet Bluetooth | 2G 3G 4G LTE GPRS Wi-Fi Ethernet Bluetooth |
| Full specifications | View on official website. | View on official website. | View on official website. | View on official website. |
Last updated: 07/11/2025.