Features:1. High-performance wireless noise reduction headphones, pure adaptive noise cancellation can effectively prevent external noise.2. Easily connect to your favorite devices via Bluetooth-Compatible and enjoy crystal clear audio and streaming without the hassle of cables.3. Compatible with iOS and Android devices. Use the multi-function in-ear controls and microphone to answer calls, control music and activate Siri.4. Can be used wirelessly or with an auxiliary cable(not included) for devices that do not have Bluetooth-Compatible capabilities. Can communicate with up to two devices simultaneously via BT.5. Swivel protector with adjustable bow. Rechargeable battery. Long battery life, can provide full-featured wireless playback.Notice:Actual color may be slightly different from the image due to different monitor and light effect.Please allow 1-3cm deviation due to manual measurement.Description:Wireless connection: BT 4.2Sensitivity: 102 dB SPL, 1 kHz/1mWFrequency Response: 25Hz - 25kHzImpedance: 32 ohmsBattery: 610mAh/3.7VBattery Life: Up to 27 hoursCharging time: about 2 hoursQuick charge: 5 minutes (2 hours of playback)Power supply: Micro USBincludes:1 x Headset1 x Charging Cable