# Modular Payment Hardware

While UmbraPayOS runs natively on smartphones, it also supports a range of **hardware modules and accessories** — such as the **Umbra Terminal**, a compact NFC-enabled payment device designed for real-world deployment.

Features of the Umbra Terminal include:

* Secure NFC interface compatible with all ZK-NFC wallets
* Local x402 caching and proof validation
* Solar-powered or battery operation
* Optional Bluetooth connectivity for mobile relay

Merchants, vending machines, or even autonomous delivery robots can integrate UmbraPayOS through this hardware, turning any physical object into a **decentralized payment node**.

For mobile merchants, the Umbra Terminal offers the simplicity of tap-to-pay combined with the strength of cryptographic validation — no banks, no fees, no surveillance.
