Shower-Mate s4 Waterproof Bluetooth Shower Speaker with ISSC Chipset and Hands-Free Speakerphone for All iOS and Android Devices - Green ISSC Chipset Built-in microphone , so you can enjoy hands-free callinG 1 year US warranty! Bluetooth wireless transmission Using high -quality audio decoder chip , allowing you to experience the perfect sound Answer calls and hold conversations through the Bluetooth microphone