They connect to your phone via Bluetooth, or some with cables. You can’t really block Bluetooth without jamming. Idk about China, but in the US that’s highly illegal, and will break every 2.4ghz device (like WiFi)
They connect to your phone via Bluetooth, or some with cables. You can’t really block Bluetooth without jamming. Idk about China, but in the US that’s highly illegal, and will break every 2.4ghz device (like WiFi)