Bluetooth speakers all connect to a resource device by using Bluetooth, but that isn’t the one audio connection available to you. Some Bluetooth speakers however have a pricey headphone jack, so that you can tether the speaker to your phone by wire. That claimed, be careful when looking at https://www.bluetoothspeaker.top/factory-cheap-modern-style-transparent-speaker-tf-card-available-wireless-bluetooth-speaker/