JBL GO 2 Portable...

Delivers deep base with clear highs and excellent vocals.Fits perfectly without causing any discomfort and can be worn for a long time.Sturdy built quality ensures that durability is never a worry.At Sony, our mission is to be a company that inspires and fulfills your curiosityUsing our unlimited passion for technology, content and services to deliver groundbreaking new excitement and entertainment, as only sony canNo other consumer electronics company today is as steeped in history and innovation as SonyThe Sony Group recognises that its businesses have direct and indirect impact on the communities in which we operateCorporate Social Responsibility is an integral part of Sony"s corporate philosophy

Frequency Response Range: 20-20000 HzActive Noise-Cancellation: YesBuilt-in Microphone: YesBattery Capacity: 55 mAh

Driver sensitivity range is about 1kHz/1mW (dB) with impedance 14 ohmsDynamic frequency response range is about 20Hz?20 kHzWith up to 25 hours 5 hours from the earbuds and 15 hours from the case of battery lifeBluetooth frequency range is up to 2.4-2.4835 GHzTransmitted modulations are GFSK, ?/4 DQPSK, 8DPSK and 55mAh 3.7V battery