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Item specifics
  • Type: Smoke Detector
  • Model Number: BQ666-4
  • Brand Name: SUNLUXY
  • Sensor: Electrochemical CO sensor
  • Alarm Style: Per EN50291
  • Audibility: 85dB (at 1m distance), Frequency 3-0.5KHZ
  • Standby Current: less than 50 mA
  • Alarm Current: less than 50mA
  • Power consumption:: 0.3mW
  • Size: 10 x 10 x 3.5 cm
  • Power Supply: 3 x AA Batteries (not included)
Product Description



4pcs SUNLUXY HFD-CO01D Home Security CO Carbon Monoxide Detector Alarm Sensor Warning
Item Description
Loud 85 decibel alarm, a permanent carbon monoxide sensor
The alarm sound pattern is 4 short beeps. The red LED will flash in alarm mode.
One chirp every 30 seconds indicates that the battery is low (need replacement) (green LED still flashes once every 30 seconds).
Test/Reset button to test the unit electronics and verifies proper unit operation and reset the unit during CO alarm.
Alarm memory: If the unit ever alarms, pressing the button, green LED will flash once every second for one minute and the peak alarm level will be indicated on the LCD.
Green and red LED lights indicate normal operation and alarm status.
The unit will sound chirp and red LED flashes once as power up.
Main photo
Product Specifications

Color: White
Sensor: Electrochemical CO sensor
Alarm Style: Per EN50291
Sensitivity/Alarm Time: Within 60~90 minutes at 50ppm CO concentration; Within 10~40 minutes at 100ppm CO concentration; Within 3 minutes at 300ppm CO concentration
LCD Display (optional): 4 digits
Audibility: 85dB (at 1m distance), Frequency 3-0.5KHZ
Standby Current: less than 50mA 
Alarm Current: less than 50mA 
Standby Mode: Green LED flashes once every 30 seconds
Alarm Mode: Red LED quickly flashes 4 times with unit chirping every 5 seconds, then repeat
Low-bat Indicator: Chirp every 30 seconds as battery lower than 3.3V with green LED flashing and "Lb" on LCD
Power consumption: 0.3mW 
Size: 10 x 10 x 3.5 cm  
Power Supply: 3 x AA Batteries (not included) 
Green LED: Flashes every 30 seconds to indicate that the unit is operating properly. The green LED will also flash before CO reading is taken and when any button is pressed.
Red LED: When a dangerous level of carbon monoxide is detected the red LED will pulse and a loud alarm pattern will sound. 
The carbon monoxide alarm pattern is 4 short beeps, followed by 5 seconds of silence, followed by 4 short beeps with a corresponding red LED flash. This cycle will continue for 4 minutes and then change to 1 cycle every minute until the device is reset or the CO is eliminated.

Product Photos

bq666_b bq666_a bq666_c bq666_4
Package Includes
4pcs x Smoke sensors
English user guide
4pcs x Screws kits
In original package



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  1. Orders processed within 4 days after payment is made and verification.
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.75kg (1.65lb.)
  • Package Size: 20cm x 15cm x 10cm (7.87in x 5.91in x 3.94in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.75kg (1.65lb.)
  • Package Size: 20cm x 15cm x 10cm (7.87in x 5.91in x 3.94in)
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