Altec Lansing IMW140-AB Dual Motion Portable WiFi Bluetooth Speaker (Black) Easy-to-use onboard song navigation and volume touch control is ideal for a party, the beach, or enjoying music while you travel. Integrated carrying strap is great for college students to carry from dorm to quad. Bluetooth technology with voice confirmation makes calling and receiving phone calls simple and convenient. High quality built-in Lithium battery plays music for up to 6 hours. Powerful wireless speaker offers a range up to 33 feet.