Sony SRS-X3 NFC Wireless Portable Bluetooth Speaker - Black (Certified Refurbished) Audio Format(s) Supported: Bluetooth:SBC Output: 10 W x 2 (AC Power)10 W x 2 (Battery Power) Power On/Off: LED Operating Indicator Audio In: Audio In: (3.5 mm stereo minijack)Electret condenser microphone (100HZ - 7 kHz)