Shelly Presence Gen4 White mmWave Radar Smart Presence Sensor
The Shelly Presence Gen4 is an advanced mmWave radar presence sensor that detects people even when they're sitting completely still, enabling truly intelligent home automation. Unlike traditional motion sensors, this smart sensor uses mmWave radar technology to sense actual presence rather than just movement, making it perfect for bedrooms, offices, meeting rooms, and any space where people remain stationary. With support for Wi-Fi 6, Bluetooth 5 LE, Zigbee 3.0, and Matter-over-Wi-Fi, it integrates seamlessly with Shelly Cloud, Home Assistant, Apple Home, Alexa, Google Home, and other popular smart home platforms.
Why You'll Love the Shelly Presence Gen4
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True Presence Detection: Detects people even when sitting still or lying down, perfect for quiet spaces like bedrooms and offices
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Multi-Person Tracking: Simultaneously tracks up to 6 people for realistic multi-occupant automations
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10 Customizable Detection Zones: Create up to 10 zones covering areas up to 42 square metres for precise, area-specific automation
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Built-In Ambient Light Sensor: Reports dark, twilight, and bright conditions for lighting-aware automation scenes
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Adjustable Sensitivity: Configure the sensor to ignore movements from pets, children, or robot vacuum cleaners
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Universal Smart Home Compatibility: Supports Wi-Fi 6, Bluetooth 5 LE, Zigbee 3.0, and Matter-over-Wi-Fi protocols
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Flexible Mounting Options: Includes free-standing weighted base, wall mount with screws, and adhesive tape mounting
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3-Year Warranty: Gen4 devices come with Shelly's comprehensive 3-year manufacturer warranty
Advanced mmWave Radar Technology
Traditional PIR motion sensors only detect movement, which means lights turn off when you're reading, working at a desk, or watching TV. The Shelly Presence Gen4's mmWave radar technology detects the slightest presence, including breathing and micro-movements, ensuring your automation responds to actual occupancy. This eliminates false negatives and creates a more natural, responsive smart home experience.
Multi-Zone Detection for Intelligent Automation
Define up to 10 customizable detection zones across up to 42 square metres with a 140-degree detection field. Perfect for open-plan living spaces, large rooms, studios, and commercial applications. Use zone-based detection to trigger different scenes in different areas - activate desk lighting when someone sits at the workstation, or turn on ambient lights only in occupied sections of a large room.
Smart Home Integration Made Easy
The Shelly Presence Gen4 connects via Wi-Fi 6, Bluetooth 5 LE, and Zigbee 3.0, with full support for Matter-over-Wi-Fi. Integrate with Shelly Cloud, Home Assistant, Apple Home, Amazon Alexa, Google Home, SmartThings, and other popular platforms. Manage and monitor the sensor through the Shelly Smart Control app or its embedded web interface for advanced configuration.
Installation & Placement
Designed for indoor use in spaces up to 8 × 8 metres (26 × 26 ft) with a maximum room height of 5 metres. The optimal installation height is 2 metres (6.5 ft) with a recommended tilt angle of approximately 15 degrees. The sensor comes pre-attached to a free-standing base with a built-in metal weight for stability on tabletops, bookshelves, and wardrobes. For wall mounting, use the included screws and wall plugs or adhesive tape (both included).
Everyday Automation Use Cases
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Hands-Free Room Automation: Walk into a room and instantly trigger lights, air conditioning, or music without switches or voice commands
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Energy Efficiency: Automatically turn off appliances and lighting when no presence is detected, reducing energy costs
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Zone-Based Smart Lighting: Illuminate only the areas in use - ideal for studios, large living rooms, and open-plan homes
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Ambient Light-Aware Scenes: Trigger different lighting scenes based on ambient light levels detected by the built-in sensor
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Privacy-Friendly Occupancy Monitoring: Monitor occupancy in restrooms, bedrooms, and offices without cameras
What's in the Box
- Shelly Presence Gen4 White sensor unit
- Free-standing base with built-in metal weight
- Wall mounting plate
- Mounting screws and wall plugs
- Double-sided adhesive tape
- USB-C power cable (power adapter sold separately)
- User and safety guide
Full Specifications
Detection & Sensing
| Detection Technology |
mmWave Radar |
| Maximum People Tracked |
6 people simultaneously |
| Detection Zones |
Up to 10 customizable zones |
| Detection Coverage |
Up to 42 m² (8 × 8 m) |
| Detection Field |
140 degrees |
| Maximum Room Height |
5 m (16.4 ft) |
| Optimal Installation Height |
2 m (6.5 ft) |
| Recommended Tilt Angle |
Approximately 15° |
| Built-In Light Sensor |
Yes (reports dark, twilight, bright) |
Connectivity
| Wi-Fi |
Wi-Fi 6 (2401 - 2483 MHz, <20 dBm) |
| Bluetooth |
Bluetooth 5 LE (2402 - 2480 MHz, <20 dBm) |
| Zigbee |
Zigbee 3.0 (2405 - 2480 MHz, <20 dBm) |
| Matter Support |
Matter-over-Wi-Fi |
| Integrations |
Shelly Cloud, Home Assistant, Apple Home, Alexa, Google Home, SmartThings |
| Device Model |
S4SN-0U61X |
| BLE ID |
0x1821 |
Physical Specifications
| Dimensions (without stand) |
64 × 41 × 26 mm (H × W × D) |
| Dimensions (with stand) |
70 × 41 × 37 mm (H × W × D) |
| Weight (without stand) |
42 g (1.48 oz) |
| Weight (with stand) |
85 g (3.00 oz) |
| Colour |
White |
| Mounting Options |
Free-standing base, wall mount with screws, adhesive tape |
Power & Environment
| Power Supply |
5 V DC via USB-C, 1 A |
| Power Consumption |
<3.5 W |
| Operating Temperature |
-20°C to 40°C (-5°F to 105°F) |
| Operating Humidity |
30% to 70% RH |
| Indoor Use Only |
Yes |
Warranty & Compliance
| Warranty Period |
3 years (Gen4 devices) |
| Certification |
CE, complies with Directive 2014/53/EU |
Specifications are sourced from the manufacturer product page and may be updated. Power adapter sold separately - use a dedicated, high-quality 5V USB power adapter for safe and reliable operation.
