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Smoke & CO Alarm YoLink Hub Required

  • $98.99
  • $119.99
Shipping calculated at checkout.

Customer Reviews

Based on 10 reviews
Robert Frey

Smoke & CO Alarm YoLink Hub Required

Nick Warmack
Easy to install, and worked when tested

Easy to install, detected smoke under test, and alerted me instantly.

I love yo link but this is a miss for me

Today must homes in USA at 1990 and up have hardwired wire smoke and CO2 comes with house because hardwired you get interconnect which important for CO2. Why not make it hardwired so they can all talk together and battery backup no primary.

Stephen gibson
Great Addition To My Suite Of YoLink Products

I bought the smoke & CO detector a year ago for the utility room and it has performed as expected. Nice to see at a glance the system status. I am planning to buy second now for upstairs monitoring.

Did not work

They both didn’t work. Reached out but have not heard back yet. Hoping they will replace as they have been good yo work with in the past. Love all their other products.



    • Smart wireless combination smoke detector and carbon monoxide detector with an audible alarm. Add life safety and property protection to any YoLink system, whether for residential or commercial applications


    • Wireless operation; no 120V outlet or wiring required
    • Industry-leading low power consumption allows for batteries to last up to 10 years, for both the Smoke & CO Alarm and Wireless Communication Base, sparing your time - replacing batteries - and saving money. (Smoke/CO Sensor Head comes with non-replaceable 10 year batteries. As suggested by the NFPA, both smoke and carbon monoxide detector heads should be replaced at least every ten years.)
    • Use the YoLink app to schedule regular automatic detector self-tests, or receive reminders to test the detector manually
    • Be warned of extremely high temperatures exceeding 135°F (57°C)
    • Monitor critical life safety detector status in real-time, using the convenient YoLink app
    • Created automations triggered by smoke/CO alarm activation (e.g. turn on sirens in the home, turn off gas lines, turn on lights)
    • Alexa and IFTTT integration
    • YoLink's industry-leading long-range communication and low-power operation


    • Provides early-warning fire detection, capable of detecting slow smoldering fires
    • Provides early warning Carbon Monoxide detection. CO is a deadly odorless glass
    • Your smoke/CO sensors on the convenient and user-friendly YoLink app (adding Smoke/CO sensors to your home does not require adding another app)
    • Four-In-One Device: Smoke detection, CO detection, high-temperature alarm, audible alarm
    • Check remotely using the YoLink app, anytime and from anywhere
    • Wireless design does not require the installation of or connection to electrical mains wiring, allowing for a simple, safe, and fast installation, with no electrical or technical experience or knowledge required. Simply mount the base to the ceiling or wall surface, then twist in the detector head*
      • The equipment should be installed in accordance with the National Fire Protection Association’s Standard 72 (NFPA72, National Fire Protection Association, Batterymarch Park, Quincy, MA 02269)
    • Create custom automation using the YoLink app, to trigger responses from other YoLink devices, such as the Siren Alarm, or Gas Valve Manipulator
    • Use the IFTTT service ( to create custom automation with YoLink and third-party devices, tailored to your particular needs and your IoT devices (IFTTT is a paid service for more than 3 custom automation)
    • Easy to install and portable; move to other locations as needed
    • Photo-electric smoke detection technology, versus ionization type, provides reduced false alarms and years of trouble-free operation
    • Carefree maintenance, with more years between battery replacement
    • UL (UL217/UL2034) and ETL Listed
    • Proven quality CO sensor, by Figaro of Japan, lasts for 10 years
    • Low-battery alerts give you advanced warning that it is almost time to replace the batteries
    • Extremely easy and fast installation using the YoLink app with Scan & Play


    • YoLink Hub is required. Starting your first YoLink system? Consider one of our kits
    • Pair your alarm with the YoLink Siren Alarm, for critical notifications
    • Pair your alarm with YoLink  In-Wall Switches, so that lights are turned on automatically in the event of a fire. This will add in evacuation at nighttime
    • Pair your alarm with a gas valve control product 


    • 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 (Unless wall-mounting, optional)
    • Installation Difficulty Level: Super Easy


    • Brand: ANKA
    • Model: AJ-939
    • Color: White
    • Compatible Detector Heads: Smoke, Carbon Monoxide
    • Power: 1 CR123A Lithium battery (3V DC)
    • Current Draw: 8.2uA (standby), < 60mA (working)
    • Battery Life: 10 years
    • Low Battery Threshold: 2.5±0.1V
    • Sound Level: 85 dB
    • Sensitivity: 1.07% to 2.64%/FT.OB
    • Alarm Mode: Audible (Piezo) & Visible (LED)
    • CO Alarm Response Times:
      • PPM: 70 - Time Until Alarm: 60-240 minutes
      • PPM: 150 - Time Until Alarm: 10-50 minutes
      • PPM: 400 - Time Until Alarm: 4-15 minutes
    • Operating Temperature Range:
      • 32℉ - 122℉ (0℃ - 50℃) (Common)
      • 23℉ - 131℉ (-5℃-55℃) (Occasionally)
    • Operating Humidity Range: 5-95% RH (non-condensing)
    • Intended for indoor use only
    • Gross Weight: 0.295KG
    • Product Size: 135mm*35mm
    • Certification: UL217 & UL2034


    • Semtech® LoRa® RF Module YL09 microcontroller with 32-Bit RISC processor
    • Color: White
    • Detection Sensors: Smoke; carbon monoxide; temperature
    • Temperature Value Accuracy: 1 (°F/°C)
    • Detection Temperature: -4°F-122°F, ±3.6°F (-20°C-50°C, ±2°C)
    • Dimensions: Φ4.80 x 0.87 inches (Φ122 x 22 mm)
    • Multi-color status LED (rear)
    • SET button (rear)
    • Power: 2 AA batteries 
    • Battery Life: 10 years
    • Current Draw: ≤ 135mA (working), ≤ 5uA (standby)
    • Environmental: 
      • Operating Temperature Range: -4°F-122°F (-20°C-50°C)
      • Operating Humidity Range: ≤95% (non-condensing)
      • Intended for indoor use only


    • (1) AJ-939 ANKA Smoke & CO Alarm
    • (1) YS7A01-UC YoLink Communication Base
    • (1) Quick Start Guide 


    • YoLink products work only in the USA and Canada 
    • The alarm is packaged only with a quick start guide. Please download the full Installation & User Guide