The switch is one of the best for the money offered. I use it in zigbee2mqtt, the relay can be disabled and use the key as a smart button, assigning control of other devices or scenarios. It is preferable to use the version with zero, the version without zero seemed that it has a slightly higher delay, I do not know what is connected with, perhaps because it does not work in router mode. Mechanically very pleasant, does not rattle, everything is quiet and tactile pleasant. Design is great, fits most interiors. Wish to the manufacturer to make versions with removable frames for 2-3-4 switches

Works perfect as advertised. Also seem to be quite accurate after minor calibration tweaks. Integration to Home Assistant also fairly easy. Just ensure your Tuya and device uses the same login and password. Would definitely recommend it!

Combination disappointing:
1. it lacks the battery (special shape: 12V)
2. In order to insert the battery, all 3 buttons must be dismantled. The bracket breaks.

Better is the 4-fold button. The battery compartment is easier to open without breaking anything.

Delivery made before the expected time.

The mermaid looks as described. Acoustic alarm not very powerful, but reliable. Fast submission. I recommend the purchase.