JAM Thrill Wireless Stereo Speaker, Built-In Speakerphone, Splash-Proof, Perfect for Pool Parties, Voice Prompts, Size of Water Bottle, Deep Bass, Crisp Tones, Mega Volume, HX-P320GR Green Connects wirelessly to any Bluetooth device in a 30-foot range. Charge for 3 hours to provide up to 6 hours of play time Splash-proof rating offers peace of mind while you party Built-in speakerphone lets you answer calls Single passive and dual active radiators provide intense sound Voice prompts tell you what the speaker is doing (powering on, connecting, etc.)