Essential details: compact Bluetooth speaker with NFC pairing technology, ATPX and A2DP codes, a noise-cancelling microphone, line-in and line-out 3.5mm mini jack port, a micro USB update port, provides ten hours of battery life, features a frequency range of 100Hz to 20kHz, plus 3db, four 36mm drive units, and four 4.5W amplifier output power, made with ASB chrome plating, with a two-part design that can be adjusted, can be attached to any bag strap or bicycle, provides a high definition sound through four speakers, and can be paired with iPhone, iPad and iPod touchWarranty: 2 years