# FAQ

> Frequently asked questions about Xisom Edge AI Box & Runtime.

## Do I need a GPU?

No. CPU-only inference works on the Lite tier. GPUs are recommended for vision models and high-throughput workloads.

## Can I run without internet?

Yes. The runtime is fully air-gappable. License activation can be done via offline file.

## Which model formats are supported?

ONNX is the primary format. Compiled TensorRT engines and sandboxed Python handlers are also supported.

## How is data secured?

All traffic on the device is mTLS. At-rest data is encrypted (LUKS) on supported hardware. RBAC is enforced for every API call.

## How do I update?

Updates are signed container images. Roll forward and rollback are one-click in the dashboard.

## What SLAs are offered?

Standard, Business, and 24/7 Critical. See [Support](/support/).