PupZi Guess not, unfortunately I do not own batteries below 12V to test. But a voltage level below 10V is not healthy for a 10V accumulator so you better look for a more specific one.

PupZi Hi I personally don't use the switch with the original firmware. But with tasmota there is no restrictions.

PupZi Probably,I personal use it on my Dell Laptop (in blue mode) and on a Samsung Tablet (with green mode).

PupZi Si,il tensione al' entrata 'diZ J

PupZi it should - for example tim and Vodafone uses the European standard. You only have to know the APN, username and password of your provider. Dail number is *99#

PupZi In short -> NO! General IoT devices uses 2.4 GHz WiFi standards (802.11*). Reasons may are different but mostly because of the ratio of coverage by sending power. In IoT then maximal data throughput is in most applications less important rather then a stable radio reception. This device (POW R2 AC90-250) is based on an ESP8266EX chip. As documented in the Data sheet the chip is designed for 802.11 n support (2.4 GHz), up to 72.2 Mbps.

PupZi Yes, the tip is hard plastic.

PupZi what do you mean with"hotswappable"? Yes, you can swap device by pushing key combination. Or you simply put the USB cable in to your next. but you can't use USB an Bluetooth simultaneously. hope this helps 😉