The Ematic Ripple Rugged Bluetooth Speaker & Speakerphone. Sing along to your favorite songs when you hit the trail with the Ematic Ripple Bluetooth Speaker and Speakerphone. The built-in microphone lets you take calls loud and clear. The compact and rugged design makes this speaker perfect for the adventure seeking on-the-go user. 30+ feet range depending on environment. Answer calls and functions as a speakerphone. IPX5 Water Resistant. Shockproof Rugged Design. Frequency Response: 100Hz. 20Khz. Built-in Rechargeable Battery. Battery Life: 4 Hours. In the Box: Speaker, USB Cable, Manual.