Give your party a boost with the Xb31 wireless speaker. Give the party a boost with extra bass. Live sound mode uses unique speakers to give a three-dimensional music festival atmosphere. Party booster adds more fun to the occasion, and the IP67 Waterproof1 design takes the party anywhere. Note-do not use or leave the system in an extremely cold or hot environment temperature outside the range of 5 to 35 degree Celsius. If the system is used or left in outside the above range, the system may automatically stop to protect internal circuitry. At high temperature, the charging may stop or the volume may reduce to protect the battery NFC: Yes; Input Output Terminals: Stereo Mini Jack (IN), USB A Terminal (DC OUT only), micro USB (DC IN)