Smart WIFI Wireless LCD Smoke Detector Tuya KD122LH – Superior Fire Safety for Your Home
Are you looking for a reliable way to protect your family, property and home from the unpredictable dangers of fire? The Tuya KD122LH Smart WIFI Wireless LCD Smoke Detector represents the next level of home security. This high-tech device combines an extremely accurate optical sensor, local audible alert and instant smart notifications directly to your smartphone. Whether you are at work, traveling or sound asleep in the next room, you will be notified of any smoldering or smoke the moment the danger arises.
Thanks to full integration with the leading Tuya Smart and Smart Life apps, this wireless fire detector turns your smartphone into a personal security center. The built-in LCD display on the device itself gives you a quick local overview of the smoke concentration status and battery charge at any time.
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Key benefits of the KD122LH smart smoke detector

Instant smart notifications (WiFi connection): When the device detects smoke, it not only triggers a local siren, but also sends an alert to your mobile phone via your home 2.4 GHz WiFi network. This way, you can take action even when you are not at home.
Clear LCD Display: The built-in real-time display shows the current smoke concentration in the air and the exact battery status, eliminating the guesswork of device operation.
Dual warning (Sound and light): In case of danger, the device triggers an extremely loud audible alarm with a volume of up to 85 dB (at a distance of 3 meters) and an intensely flashing red LED light, ensuring that you will not miss the alarm even during deep sleep.
Advanced photoelectric technology: The built-in optical (photoelectric) sensor is extremely sensitive to slow-smoldering fires that produce a lot of thick smoke, while being designed to minimize the possibility of false alarms (e.g. due to water vapor).
Long lifespan and low power consumption: The sensor itself boasts a lifespan of up to 10 years, and the included AA batteries provide up to 3 years of operation due to their extremely low standby power consumption.

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Technical specifications and features of the detector
The KD122LH Smart Wireless Smoke Detector is designed with easy installation, long-lasting reliability, and seamless connectivity in mind. Below are all the technical data that confirm the superior quality of the device:

Sensor type: Optical (photoelectric) smoke sensor
Gas detected: Smoke (early stages of smoldering and fire)
Alarm type: Loud audible alarm, light (LED) and remote notification in the app
Alarm volume: ≤85 dB at a distance of 3 m
Connectivity: WiFi standard 2.412 – 2.480 GHz (transmission power max +16 dBm @ 802.11 b)
App Compatibility: Works with Tuya Smart and Smart Life apps
In-app features: Receive remote alarms, low battery alerts, event history
Local control: TEST button for quick operation check and muting
Power supply: 3 x AA batteries (batteries included)
Current consumption: In standby mode ≤2 µA, during active alarm <120 mA
Battery life: Up to 3 years of operation
Sensor life: Up to 10 years of stable operation
Mounting method: Easy mounting on wall or ceiling (screw and wall insert included)
Operating conditions: Temperature from -10°C to +50°C, relative humidity <95% (non-condensing)
Dimensions: 85 x 47 mm
Weight: 85.5g

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Why choose an optical (photoelectric) smoke sensor?
Unlike older ionization detectors, optical or photoelectric smoke detectors operate on the principle of a light beam inside a measuring chamber. When smoke particles enter the chamber, the light is scattered and focused on a photosensitive sensor, which immediately triggers an alarm. This technology has been proven to be most effective in detecting smoldering fires – for example, overheated electrical wiring, smoldering upholstered furniture or mattresses – which are the most common causes of household fires at night. By purchasing the KD122LH model, you ensure the highest level of safety against such hazards.
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Easy to install and use in any space
Thanks to its compact dimensions (85 x 47 mm) and neutral white color, the smoke detector blends inconspicuously with any interior. It is ideal for installation in key areas such as:

Bedrooms and children's rooms: For maximum safety during sleep, when our senses are most vulnerable.
Living rooms and hallways: Where the most electrical consumers and passageways are located.
Kitchens and dining rooms: Where the risk of fire from cooking is greatest (place appropriately away from direct steam).
Garages and offices: To protect your work environment and stored vehicles.

Installation is extremely simple. The included kit includes a screw and wall insert, allowing for quick mounting to a wall or ceiling. After installing the batteries, you can easily connect the device to your home WiFi network via the Tuya app on your smartphone.
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Frequently Asked Questions (FAQ)
1. How does smartphone notification work and do I need a special control panel?
No, you don't need any additional hardware or control panels to use the smart features. The KD122LH smoke detector connects directly to your existing home WiFi router (2.4 GHz frequency). Through the free Tuya Smart or Smart Life app, you will receive push notifications about alarms, low battery levels and view event history anywhere in the world where you have internet access.
2. How often do I need to test the device and replace the batteries?
It is recommended to regularly check the device's operation once a month by pressing the built-in TEST button. This will trigger a short sound and light signal and confirm that the device is working properly. The included 3 x AA batteries have a lifespan of up to 3 years. When the batteries are low, the device will alert you with a local signal and a notification in the app.
3. What to do when an alarm is triggered?
When the alarm sounds, stay calm and immediately investigate the source of the threat. If it is a non-dangerous source (e.g. a small amount of smoke from burning food), you can silence the alarm and ventilate the room. In the event of an actual fire, however, immediately leave the building, help other household members and immediately call the emergency services (112). The rapid response that this detector allows you to provide saves lives.


Responsible persons:
Kruger&Matz - Lechpol Electronics Leszek Sp.k. St. Garwolińska 1, 08-400 Kovnica, Poland, maciej@lechpol.pl +48 665 014 014

Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Installation: Download the Tuya Smart app to your phone.
• Preparation: Insert the battery into the detector. Make sure your phone is connected to a 2.4 GHz WiFi network.
• Pairing: In the app, select "Add Device" -> "Security & Sensor" -> "Smoke Detector (WiFi)".
• Activation: Hold down the "Test" button on the detector until the light starts flashing quickly (entering pairing mode).
• Confirmation: Follow the instructions in the app until the connection is successful.

Useful tips:
• Monthly Testing: Press the "Test" button regularly to check the siren and WiFi connection. The app will send you a notification that the test was successful.
• Positioning is key: Place the detector in the center of the ceiling in bedrooms, hallways, and living rooms. Avoid the kitchen directly above the stove to prevent false alarms from cooking.
• Sensor cleanliness: Remove dust from the detector once a year with a vacuum cleaner or a dry cloth. Dust inside the chamber can cause false alarms or reduce responsiveness.
• Battery and WiFi: Smart devices consume more power than regular devices. When you receive a "Low Battery" notification on your phone, replace the battery immediately. We recommend using high-quality alkaline or lithium batteries.

Warnings:
• Do not paint the detector: Paint can clog the air vents and prevent smoke from reaching the sensor.
• WiFi range: Make sure the location where the detector is installed has a stable WiFi signal. If the signal is weak, the detector will still beep, but you will not receive a notification on your phone.
• Lifespan: The sensors in smoke detectors have a lifespan of approximately 10 years. After this time, replace the device with a new one, regardless of whether it is still working.

User view

The Tuya KD122LH Smart WIFI Wireless Smoke Detector LCD is designed for those who want to increase safety in their child's room, home or even a vacation home - without complicated installations or worrying about whether the alert will arrive in time. Parents especially appreciate the wireless connectivity and clear LCD notification, which helps to increase transparency in everyday life when you have more things on your mind. For users who swear by a modern home and automation, the device is meaningfully integrated into the smart ecosystem via the Tuya platform, making it easy to monitor and alert even when they are not at home.

The Kruger brand is recognized by customers for its focus on user experience, which inspires a sense of confidence even when choosing safety solutions for the youngest family members.

Why buy at Enaa

We offer you a simple and secure purchase directly from the comfort of your home, plus detailed support from a professional team is available to help you choose the most appropriate solutions for your family.

Answers to frequently asked questions

Can I use the detector in other rooms, not just the children's room?

Of course, a smoke detector is suitable for use in any room where you want to provide additional fire safety, for example in a living room or hallway.

Do I need a constant WiFi connection for the detector to work?

A WiFi connection is required to receive notifications on your smartphone and connect to the app, and the detector detects smoke and triggers an alarm even when the network is not available.

What does connectivity with the Tuya platform mean?

Connectivity with the Tuya platform allows you to integrate the detector into your smart home system and monitor events in real time via the app or set additional custom alerts.

Does the detector have the ability to reset or silence the alarm?

The detector provides basic monitoring functions via the app, including the ability to silence the alert or reset it if a false alarm is detected.

Is the LCD screen visible at night or in darker rooms?

The LCD screen allows basic visibility even in low light, but for full visibility it is recommended that the room is at least partially lit.

Description updated: April 2026