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BRAND:  yolink        MODEL: 3yS7804

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Motion Sensor 3-Pack, YoLink Hub Required!
Motion Sensor 3-Pack, YoLink Hub Required!


3-pack of the YoLink Motion Sensor, model YS7804. The Motion Sensor is an indoor general purpose motion detector that can be used for movement detection for intrusion detection, lighting control, occupancy sensing, elder care, and HVAC-related functions (for example, turning off A/C if there is no motion detected in a room). Please note: a YoLink Hub or SpeakerHub is required (see below).




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2-Year Warranty

Do-It-Yourself Installation

U.S. Phone Support Available

100% Satisfaction Goal




Home Assistant

Raedius Web Console




  • Smart wireless motion detector, for security and lighting control applications


  • Exceptional value; the features you need at a great price
  • Add safety, security, and convenience to your life with lights that automatically turn on when you enter your home or a room
  • Sensor may be used to turn off lights and devices or equipment when not needed, potentially lowering your power bill
  • Lower cost of ownership than other technologies; low-power operation means batteries may last over 3 years, compared to 1 or 2 from other brands
  • Carefree maintenance, with more years between battery replacement
  • Low-battery alerts give you advanced warning that it is almost time to replace the batteries
  • Uses standard alkaline batteries (2 AAA batteries); no Lithium or special batteries required
  • Extremely easy and fast installation using the YoLink app with Scan & Play

  • Use the YoLink smartphone app to remotely monitor the real-time motion/movement activity status of your home or property
  • Use app automation settings to respond to the presence of people in your home or property
  • Security/intrusion detection applications may include activating a Siren Alarm and/or receiving an alert notification on your smartphone when the sensor is activated
  • Occupancy sensor or presence detection applications include the control of lighting, ceiling and exhaust fans, and other devices or equipment you wish to turn on when the room is occupied or turn off when not – turn bathroom, storage room, laundry room, walk-in closet lights, etcetera, off when not in use

Main Controller: Semtech® LoRa® RF Module YL09 microcontroller with 32-Bit RISC processor

Motion-sensing area dimensions:

   360° coverage

   120° side profile

   6 – 20 feet detection range

Suggested Mounting Height: 5′ (Wall) or 9-13′ (Ceiling)

Color: White

Dimensions: 2.44 inches wide x 1.1 inches high

User Interface:

   Multi-color status LED (front)

   SET button (rear)

Power: 2 AAA batteries (3V DC)


   Operating Temperature Range: 32°F – 122°F (0°C – 50°C)

   Operating Humidity Range: 0 – 95% non-condensing

Intended for indoor use only

Quantity 3 of each:
(1) YoLink Motion Sensor (batteries included)

(1) Mounting plate with 3M™ brand double-sided mounting tape
(1) Quick Start Guide
  • YoLink Hub with an internet connection (wired Ethernet or 2.4GHz Wi-Fi). Refer to the Hub user guide for additional information
  • Smartphone or tablet running iOS 9 or higher, Android 4.4 or higher
  • Tools Required: None
  • Installation Difficulty Level: Super Easy
If you have not already visited these pages, please do so. If any of our product information is found to be insufficient or if you have any remaining questions, please use the Contact Us area near the bottom of this page. Click or tap for more info:

Start Here: Hubs & Starter Kits

Security/Intrusion Detection

Power & Lighting

For full functionality, including for the app to work, YoLink devices must connect to at least one hub (YoLink Hub or SpeakerHub), and that hub must have an internet connection. Unless you are adding devices to an existing YoLink account, or unless your building is covered by an existing YoLink or Raedius wireless network, please add one hub to your order.

We want you to get the most out of your YoLink products! Customers that use our indoor Motion Sensors for home security often do not think it can be used for lighting control, or vice versa, but you can use your Motion Sensor for both! Consider one of our light switches, teamed up with your motion sensors, to light a room up as you enter it. Hands-free and convenient! This is especially popular for bathroom foyers and vestibules (where your hands are typically full as you arrive home) as well as for walk-in closets, storage and laundry rooms. 

If you've set up a motion sensor to turn on the bathroom light, you can arrange for the lights to turn automatically after a period without motion detection. Door sensors can also be used to determine if a light should turn on or off. For example, a door leading to the garage can have the garage lights turn on, then the motion sensor can turn them off after, for example, 10 minutes without motion being detected. This is extremely easy to set up in the app, as well as with IFTTT or Alexa or Google Assistant. In those cases, you can control non-YoLink lights, switches and plugs (as long as they have a "skill" or integration with IFTTT/Alexa/Google).

And, it is very easy to use your motion sensors for home security! Add one of our siren products, one of our hubs, and you have a basic security system. Add door sensors on exterior doors and windows, add an AlarmFob or FlexFob (to arm/disarm the system) and you have an easy to install and economical home security system!

Give it a try! Our customer support department is here to assist with any questions that come up!

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YoLink Outdoor Motion Sensor, YoLink Hub Required - YoLink
Q:  Are the batteries replaceable?  A: Yes. They are easily replaced. It takes two AAA batteries.

Q:  This can be mounted on a wall, too?  A: Yes. Refer to the user guide for specific information on mounting heights, but the sensor can be wall-mounted. Please note, the sensor has a built-in magnet, that makes it very easy to install on metal surfaces. 

Q:  I can use this outdoors?  A: Some customers have had success using our motion sensors in their mailboxes and carports or other outdoor locations (that have overhead cover and protection of the elements) but the sensor was designed for indoor use. Consider our Outdoor Motion Sensor for outdoor applications. 

Q: Do I need the hub?  A: Yes. For full functionality, and for the app to work, the Valve Controller must wirelessly connect to one of our hubs (the original YoLink Hub or the SpeakerHub - learn more here) that has an internet connection. It is possible to use Control-D2D pairing to establish links between your motion sensors, and a Siren Alarm or Dimmer Switch, for example, so that the siren will activate on motion detection, or the light will turn on for motion detection, but that is not the preferred normal operation. For the app to work, including remote viewing and controlling of your YoLink devices, device health checks, battery level, and firmware updates from the factory, you should have a hub.

This product is a member of the following collections:

Security / Intrusion Detection

Power & Lighting

Do you have questions? We have answers!

Do you have questions? We have answers!

Please fill out the form below, or if your matter is urgent, please call us at  949-825-5958. Please note our Irvine, California office hours: 9AM - 5PM Pacific, Monday through Friday. You may experience waits as we attend to previous customer requests. 

Please fill out the form below, or if your matter is urgent, please call us at  831-292-4831. Please note our Irvine, California office hours: 9AM - 5PM Pacific, Monday through Friday. You may experience waits as we attend to previous customer requests.