Bluetooth - Supports A2DP, AVRCP, HFP. Hands-free speakerphone with built-in microphone. Microphone activate button. Voice control convenience when connected to your Smartphone. Aux Line In. Selectable 3 color light ring. IP67 Waterproof. Built-in stand and hanger ring. Suction cup for sticking to the shower wall. True Wireless Stereo (TWS) - wirelessly connect a second Bluetooth speaker to achieve stereo sound from the 2 speakers.