Very small, lightweight.
I works with arduino libraries. You will need usb uart programmer for it. Or you can use arduino nano as a programmer by soldering uart pins between them and shorting reset pin.
You can do a lot with this, weather station, rgb strip controller etc.
There are thousands of redy to go project over internet

Received in good condition. 5mm as described. I did not unroll it to see if the length matches, but I am not worried, it seems OK.
Just what I needed to ground dome plastic dust collection hose.

I haven't tested them yet, but the shipment was compact and it was delivered in the right conditions. I'm sure this works properly.

Impecável! Cumpre perfeitamente o objecivo a que se destina.
Carece apenas de bootloader, pormenor que é contornável.
Preço muito bom

I have tested these buttons and they work as it should. The shipment was fast, so nothing to complain about.

Le produit est conforme à la commande.
Les fiches sont faciles à souder et elles s'accordent très bien avec les prises jack que j'avais acheté.
Remarque : Il faut faire attention au diamètre car il existe plusieurs versions.

Cheap and very nice product for DIY, it works well and it's great to do some littel work here and there. Product is nice

Great set if you wanna learn about Arduino. Many many items and you can play for days.

Very easy to use . The signal is very good. Ideal for old tv speakers . Try it out

motores trabalham bem, perfeito para o projeto arduino. material razoável para o preço. trabalham com várias voltagens .dc.

Le produit est conforme à la commande.
Je n'ai pas encore utilisé ces interrupteurs mais il semble de bonne qualité.

Muy buena calidad y excelente precio. Envío rápido. Recomendado.

Nice, all good

Alles super.

Muy bien