Soundflow, Black, Sound Board Portable Speaker, Requires No Wires, No Pairing & No Connection, Just Lay Your Smartphone On Top Of The Product, Soundflow Wireless Audio Does The Rest By Flowing Your Smartphone Audio To The Soundboard's Larger Speaker, Supports Virtually All Brands & Models, In Fact, Almost Any Portable Device With A Speaker Works With A Soundboard, Uses 3 "AA" Batteries, Not Included.