Shelly 1 Gen4 — Single-Channel Multi-Protocol WiFi+Zigbee+Matter Relay

Shelly 1 Gen4 — 1 Channel Multi-Protocol Dry Contact Relay

The Shelly 1 Gen4 (model S4SW-001X16EU) is a 1-channel smart relay with dry contact and multi-connectivity WiFi + Zigbee + Bluetooth 5.0 + Matter. Compatible with Apple HomeKit, Amazon Alexa, Google Home, and Home Assistant. No hub or subscriptions required.

Technical Specifications — Shelly 1 Gen4

• Model: S4SW-001X16EU
• Connectivity: WiFi 802.11 b/g/n/ax (2.4 GHz) + Zigbee + Bluetooth BLE 5.0 + Matter
• Power Supply: 110-240V AC / 24-48V DC / 12V DC
• Maximum Load: 16A / 1 channel
• Contact Type: Dry (potential-free)
• Channels: 1
• Energy Metering: No
• Operating Temperature: 0 - 40°C
• Dimensions: 37 × 42 × 16 mm
• Weight: 26 g
• Certifications: CE, RoHS, Matter
• Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, Scripting (mJS), KNXnet/IP

Key Features

• Multi-protocol: WiFi, Zigbee, Bluetooth BLE 5.0, and Matter — compatible with any smart home ecosystem
• Potential-free dry contact — controls everything from lights to gates, boilers, or water pumps
• Compatible with Apple HomeKit and Siri without an additional hub thanks to Matter and Zigbee
• Wide power supply range: 110-240V AC and also 12V / 24-48V DC for special installations
• Advanced scripting with mJS and KNXnet/IP support for professional installations
• Local automations without internet — works offline with integrated logic
• Ultra-compact design (37×42×16 mm, 26 g) — fits behind any conventional switch

Compatible with

• Apple HomeKit and Siri
• Amazon Alexa
• Google Home
• Home Assistant (local, no cloud)
• Matter (over WiFi and Zigbee)
• MQTT, HTTP REST API, Scripting mJS

Use Cases

• Lighting control from mobile, voice, or physical switch
• Automation of gates, blinds, or security systems via dry contact relay
• Control of boilers, pumps, and HVAC in homes and offices
• Integration with Home Assistant or Apple HomeKit without additional hub
• Automations based on schedules, sensors, or smart home scenes

Official Shelly distribution. Shipping from Spain. Official Shelly warranty.