Bluetooth Streaming Audio (A2DP) Protocol Version 1.0 Installed/ Simple Secure Pairing/ Waterproof Rotary Encoder Volume Control/ White LED Button Illumination/ Front Panel Sub Control/ Voice Command Confirmation/ Rear AUX-In/ Rear USB With 1A Charging Only/ Epoxy Coated Circuit Board For Water Resistance/ 20 Hz To 20 kHz Frequency Response/ Black Finish
