Skroutz.eu

Very good for their price (around 20), I would buy them again. The size corresponds to reality.

The worst alarm is the one that doesn't exist. With 10€ and something extra, you have a great alarm, of course, to avoid amateur thieves who are the majority. It works exactly as promised, its sound is powerful. Suitable for motorcycles and bicycles.

The ultimate value for money, better sound quality than the uv5. Its great advantage is the dual transmission button that allows you, apart from listening, to transmit on two different frequencies at will (this was the reason I chose it)

The zoom is fixed, it doesn't change. The rotating ring is for adjusting the image based on distance. Overall good quality, the base is quite stable but there is a possibility of damaging the screen since it applies pressure. I would say the zoom is somewhere around 8x. The image gets blurry at the edges of the frame.

It comes activated with its puk and a sticker with its phone number (external) and apn. It does exactly what the description says, suitable for alarms and GPS trackers. Whoever doesn't know how to use it, it's better to buy a cu or cosmo card

It works consistently and flawlessly, its app is great. It consumes about 2-3 watts per hour at 5 volts. The image is decent for 720p despite claiming to be 1080p (obviously upscaled).
Don't expect good night vision beyond 2 meters or in complete darkness.
The negative aspect is its limited wifi range, as it loses signal with a distance of 5 meters from the router and one wall in between.