DRUnKQUEEn Bluetooth Headphones, Bluetooth Headset, V4.1+EDR Noise Cancelling Hi-Fi Foldable Built in Microphone Super Extra Bass Stereo Wireless Over Ear Earphone, Support SD Card FM Radio Iconic powerful bass resonance: Unexpected 57mm ultra-large dynamic drivers, turbine style housing, with iconic surging low-frequency shock, let you feel the bass resonate deep in the chest, enjoying the best sound quality. Clear and transparent bass, mids and highs, fully exposed to all the details of song, you can hear what the artists really want you to hear Ultra-long operation and carefree calling from Bluetooth 4.1: With robust high speed CPU of Bluetooth 4.1 operating system, comes with ultra-long 40 hours music, 45 hours talk and 1625 hours (around 67 days) standby time, the same battery, decrease up to 40% power consumption compare to Bluetooth 4.0. Acoustic echo cancellation and noise reduction effectively reduce ambient noise while talking Customized function: Audio Sharing allows you to connect to another headphone via audio cable, share music feast with your friends instantly(*recommended to use headphones with impedance of 32 or higher). Seamless connect two Bluetooth devices simultaneously, listen to music or enjoy foreign blockbusters, do as you think about it Comfortable wearing: Custom fit supra-aural soft earmuffs, artificial protein leather of earmuffs simulated to human skin texture, ensure long lasting comfort in various rugged circumstances With an attached audio cable, you can still enjoy favorite music when the battery is flat. Also you can share music with your best friend throgh its Line-Out Audio