🔍 I check the received model
The technical sheet indicates the model ZY-ZTH03. On the cardboard, the model is perfectly visible:
The Zigbee Sonoff aperture sensor SNZB-04P offers reliable detection for doors, windows and shutters. This detailed test covers unpacking, physical and software installation with Zigbee2MQTT and Home Assistant, possible automation and long-term monitoring. Find out why this economic model under 15 € excels in home automation Zigbee 3.0. Read More
The technical sheet indicates the model ZSS-KB-TH-LF-C-MS. On the cardboard, it is written in tiny and almost illegible, but on the back of the sensor, the model is perfectly visible:

Good surprise: the battery is included. So I can test the sensor immediately, without having to buy a specific model. The supplied battery is new, protected by a tab.


Installation is very simple: the sensor stands, sits on a piece of furniture or sticks to the wall with the supplied double-sided (or not depending on the batch). I have nothing to break through: it is clean and reversible.
On the cardboard, it is impossible to read the reference – they dared gray on gray gradient! It is unreadable, so I advise you to check the model on the seller’s website before purchasing.

Fortunately, on the back of the case, the reference is clearly legible. Checking the information on the product received is essential to ensure that it matches the order.

Good news: the battery is included, allowing the sensor to be tested immediately without any additional purchase. The battery is new, protected by a tongue.

The CR2450 battery is present in the box, it is announced for 4 years of battery life! (to be confirmed over time of course). It is new and protected by a tongue.
Could not find the reference on the thermometer, it is indicated on the box

I note that in the received model, AAA batteries are not included. Read More
Cannot find the reference on the box or on the thermometer, it is indicated on the package leaflet (copy at the bottom of this page)
I note that in the received model, the stack is well included. Read More
Cannot find the reference, neither on the box nor on the device, it was the detection in Zigbee2MQTT that gave me the reference, it corresponds to the photo of the pairing
I note that in the received model, the 2 AAA batteries are not included. Read More
On the date of writing of this Retex:
This thermometer uses 3 AAA batteries not supplied
I switch Zigbee2MQTT to pairing mode and plug in the last stack.
When connecting the battery, the temperature is displayed on the thermometer screen, it is just right.
The pairing starts…
My test stops there, we will have to wait until this thermometer is integrated into Zigbee2MQTT…
It remains a beautiful product, well finished, but if we want to integrate it, we will have to go through Tuya and not Zigbee2MQTT directly, which I refuse to do.