Sjiczing No. It's not bluetooth . Small usb as a receiver from the keyboard. But it works very well. As a mouse and keyboard.

Sjiczing Yes, I Can. I do this with a power bank that doesn't automatically shut down .

Sjiczing Headphone connection is not possible as the speaker only has BT receiver. If you want to connect headphones and speaker at the same time, I recommend buying this one too. BlitzWolf BW-BR6 2 In 1 OLED Display bluetooth V5.0 Audio Transmitter Receiver 3.5mm Aux 2RCA Wireless Audio Adapter for Nintendo Switch PS5 TV PC Laptops Headphones Apple AirPods Pro Home Stereo Car Sound System. it works very well with everything .

Sjiczing Ithink it works with all phones that have usb type -C If a phone is in phone case, it is difficult to connect it

Sjiczing Primeroconecte un altavoz al teléfono, luego encienda el otro altavoz y luego conecte los dos altavoces. Si entendí la pregunta correctamente ;)