• Red electronic device with wiring diagram and Shelly Gen4 branding on a white background
  • Red tool with multiple sockets on a white background
  • Red electronic device with wiring diagram on a white background
  • Red electronic device with wiring diagram on a white background
  • Red electronic device with text and symbols on a white background
  • Red electrical connector with terminal blocks on a white background
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Shelly

Shelly 1PM Gen4. Smart Relay Switch with Power Monitoring & Multi-Protocol Connectivity (Open Box)

Shelly 1PM Gen4. Smart Relay Switch with Power Monitoring & Multi-Protocol Connectivity (Open Box)

1PM Gen4_OB_AN

Condition: Open Box

This product is sold AS IS, fully functional and inspected by Digital Bay Tech for proper operation and cosmetic condition, unless explicitly stated otherwise. Final sale, no returns or exchanges. Manufacturer warranty may apply if available. The customer is responsible for any shipping costs related to warranty service.(*)

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This product is sold AS IS, fully functional and inspected by Digital Bay Tech for proper operation and cosmetic condition, unless explicitly stated otherwise. Final sale, no returns or exchanges. Manufacturer warranty may apply if available. The customer is responsible for any shipping costs related to warranty service.(*)
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A compact smart relay designed for reliable appliance control and real-time energy monitoring.
Shelly 1PM Gen4 combines fast performance, multi-protocol connectivity, and precise power measurement, making it ideal for lighting, appliances, and heating applications.

Designed to fit behind existing switches and outlets, it’s a flexible solution for retrofits, new installations, and professional automation projects.

    Why Shelly 1PM Gen4

    Same trusted design. More compatibility. Smarter control.

    Shelly 1PM Gen4 builds on the proven reliability of previous generations while adding multi-protocol support, allowing you to choose the best communication method for your setup—Wi-Fi, Zigbee, Bluetooth, or Matter.

    With built-in power monitoring, local automation, and advanced integration options, it helps optimize energy usage, improve system compatibility, and deliver dependable performance in a compact, easy-to-install form factor.

    Key Features

    • Multi-Protocol Connectivity
      Choose between Wi-Fi, Bluetooth, or Zigbee for flexible integration across different smart home ecosystems.
    • Matter-Certified
      Works within Matter-enabled environments, ensuring future-proof compatibility and reliable local communication.
    • Power Monitoring
      Built-in precise power metering provides real-time energy consumption data and historical insights for analysis and optimization.
    • Range Extender & Bluetooth Gateway
      Functions as a Wi-Fi and Zigbee range extender and Bluetooth gateway, strengthening network coverage.
    • Compact Design for Retrofits
      Ideal for installation behind existing wall switches or sockets, making it perfect for upgrades and hidden installations.
    • Low & High Voltage Support
      Supports both low- and high-voltage applications, increasing installation flexibility.
    • Advanced Automation & Integrations                                                                              
      Supports schedules, scenes, local actions, scripting, HTTPS, MQTT, inbound/outbound WebSockets, and virtual components.
    • KNXnet / IP Support
      Compatible with KNXnet/IP communication, enabling integration into professional building automation systems.
    • Overheating Protection
      Includes an internal temperature sensor for added safety and thermal protection.
    • No Hub Required
      Operates directly via Shelly Smart Control app and integrates with major platforms and voice assistants such as Alexa, Siri, Home Assistant, and Apple HomeKit.
    View full details

    Gen4 devices

    Experience next-level smart home automation with Shelly Gen4 novelties.
    Each Gen4 device offers multi-protocol connectivity, featuring Wi-Fi, Bluetooth, Zigbee, and Matter.
    Choose your connection and set up your Shelly device to work with your preferred smart home network in no time.

    Common Use Cases

    • Lighting Control & Automation

      Control and automate indoor or outdoor lighting circuits, adding smart control and energy monitoring behind existing wall switches.

    • Appliance Control

      Remotely control appliances such as heaters, pumps, fans, or kitchen devices while monitoring their real-time power consumption.

    • Energy Monitoring & Optimization

      Track energy usage to identify inefficient devices, reduce standby power consumption, and optimize electricity costs.

    • Heating & Floor Heating Systems

      Ideal for controlling electric heaters or floor heating systems, with precise power monitoring and automation based on schedules or conditions.

    • Smart Home Retrofits

      Perfect for upgrading existing installations by installing the relay behind switches or sockets, without changing visible hardware.

    • Professional & Advanced Automation Projects

      Suitable for advanced smart home and building automation projects, including integrations with KNX, MQTT, and custom logic.

    Functionalities

    • Multiprotocol connectivity

      Highly compatible! Choose the best protocol for your smart home—Zigbee, Wi-Fi, or Bluetooth

    • Matter certified

      Integrates into any Matter ecosystem

    • Smart schedules

      Set custom schedules based on your daily agenda or follow the sunrise/sunset and control your lighting accordingly.

    • Power monitoring

      Shelly 1PM Gen4 provides precise monitoring of power consumption and free data storage.

    • Wide range of voltage support

      Use it to control a wide range of devices and appliances.

    • Smart scenes

      Set custom scenes by combining Shelly 1PM Gen4 with your other devices.

    Frequently Asked Questions

    What is Shelly 1PM Gen4 used for?

    Shelly 1PM Gen4 is a smart relay switch designed to control electrical circuits and appliances while providing real-time power and energy monitoring.

    Does Shelly 1PM Gen4 require a hub?

    No. Shelly 1PM Gen4 can operate directly over Wi-Fi without a hub. Zigbee or Matter integrations may require a compatible controller, depending on your setup.

    Can it be installed behind an existing wall switch?

    Yes. Its compact design makes it ideal for installation behind existing switches or sockets, perfect for retrofit projects.

    What load can Shelly 1PM Gen4 handle?

    Shelly 1PM Gen4 supports both low- and high-voltage applications and is suitable for controlling lighting, appliances, and heating circuits within its rated specifications.

    Does it continue working if the internet goes down?

    Yes. Shelly 1PM Gen4 supports local control and local automations, allowing schedules and actions to keep running on the local network even without internet access.

    No hub required, Universally compatible

    Shelly Products can be controlled locally, directly and without a hub through your smartphone/table with Shelly App - no hub or other equipment needed with Wi-Fi Protocol.(*)
    Enable cloud feature and get remote control from anywhere. At the same time, you can integrate Shelly directly with virtually every smart home hub, voice assistant, open source platform, or premium control system.

    (*) Platform app / Hub required when used with Zigbee / Matter

    		Shelly App
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms Shelly compatible platforms

    No hub required, Universally compatible

    Shelly Products can be controlled locally, directly and without a hub through your smartphone/table with Shelly App - no hub or other equipment needed with Wi-Fi Protocol.(*)
    Enable cloud feature and get remote control from anywhere. At the same time, you can integrate Shelly directly with virtually every smart home hub, voice assistant, open source platform, or premium control system.

    (*) Platform app / Hub required when used with Zigbee / Matter

    Shelly App
    Shelly compatible platforms
    Shelly compatible platforms
    Shelly compatible platforms
    Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms
    Shelly compatible platforms Shelly compatible platforms

    Warranty

    • USA Pro Market Manufacturer Warranty: Lifetime manufacturer warranty (only if installed by a professional within USA) when purchased at Digital Bay Tech.

    • Retail Standard Manufacturer Warranty (included in purchase price): 2, 3 or 5 years manufacturer warranty covers only the hardware (corpus, mechanics, and display, if any) and does not cover consumables (battery) and accessories insofar as these are subject to exhaustion (decrease of their useful life) depending on the intensity of their use. Device malfunctions are only covered when device is used as described conditions within user manual (max loads, proper installation, etc.). Please check refund policy for further details.
    • Gen 1: 2 years.
    • Plus, Gen3, Gen4, Wave: 3 years.
    • Pro Line: 5 years.

    Special Notes

    • Do It Yourself: Devices are technically user-installable in many locales, nevertheless consulting a licensed electrician to install shelly components is recommended; in addition to being licensed to work with electrical devices, they are also familiar with local building codes and regulations to keep your safety.
    • Manufacturer's Safety note: Each Shelly device generates heat under load. Do not combine two or more Shelly devices stacked on top of or beside each other in a confined space. There must be a minimum distance of 0.4 inch / 1 cm between them to allow for airflow.

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