Altoparlante 2" 10W Retro Bluetooth Barra Lunga 4D Surround Audio Bassi Pesanti Blu Scuro
Functions: Bluetooth, TF, AUX mode. Usb flash drive, FM, speakerphone (the microphone is probably near the switch). Bluetooth model: E-3404. U disk /TF card: only support 32G. Mode switching: Press the knob around 2S for switching mode.