Preserve your SonicWall environment while extending security coverage with the TZ370W Secure Upgrade Appliance. This model is intended for existing SonicWall customers with an active SonicProtect subscription, giving you a clean upgrade path instead of a full platform change. That matters when you want to refresh hardware, maintain policy continuity, and avoid the disruption of reworking a stable firewall deployment. The TZ370W adds wireless-AC capability to a compact security appliance designed for branch and small office environments. It fits teams that need dependable perimeter control, secure remote access, and straightforward administration in a single device. Because it is sold as an upgrade appliance only, it is positioned for organizations that already understand their SonicWall footprint and want to extend it with a current hardware platform. For procurement and infrastructure teams, the value is in continuity: keep the security stack you already manage, refresh the appliance layer, and stay aligned with your existing SonicWall support model. If your priority is protecting business traffic while minimizing migration effort, this upgrade path is the practical choice.