2.4G Wifi Smart CO Carbon Monoxide Detectors Tuya App Remote Control Sensor Home Security Alarm Alert System No Need Gateway

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English User Manual://drive.google.com/open?id=1mH_KzqpHTaIrm5ooCc51mGdPJWDX1XPn
Instruction for installing:
1.Press ldquoTest” button on device for 6 seconds and release, when indicator led will be fast flashing. Go to the App, press “,,then go to category of “Sec-urity & Sensor”, press “Sensor (WiFi) “and add this device accordingly.
2.When install on wall, it will be more convenient by using hanging holes: fix screws on wall firstly and then hang the device there.
3.When install on ceiling, use installing holes: with screws insert into the holes, along-with the base of the device, he tightly on the ceiling. Other parts of the device will be spin tightly to the base accordingly.
4.Not to install the device near the air exit, air exchanging fan, room door and any places with more wind flowing volume.
5.Not to install the device at any place where can be sprayed by water.
6.Suggestion: install the Alarm inside any room where CO is using .
Measuring method:Warm up Mode
Measuring Mode:Automatic
Display Mode:LED digital within 3 numerical
Alarm Mode:Acousto-optic
Power supply:3pcs AA battery 4.5V or USB 5V 500mA standby current <50muA
Performance Index
Measuring concentration:000*999ppm
Concentration Quality Level Display on device Alarm status
ge40-75ppm Level 1 Lighting for 1 min then extinguish No Alarm
ge75-150ppm Level 2 Continuous lighting No Alarm
ge150ppm Level 3 Continuous lighting Alarm rises



We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-20 Business days
Canada, Europe 10-20 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
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We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of . (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://besthomeelectronics.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


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Please do not send your purchase back to us unless we authorise you to do so.

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