Now just stop worrying about wires hanging from here and there. Wired is passé. Connect with any Bluetooth device, connect and play. Dead batteries can kill your vibe. boAt Rockerz is designed to play for up to 8 hours. It has a high definition sound. Don't just be loud, be loud and clear. We guarantee you have not heard such powerful bass and vocal clarity from a wireless headphone. The boAt super bass Rockerz 400 wireless headphones will make your listening experience personal and for real. Plug it in and plug into nirvana. Contact_us on: [ 02242102403 ] List of service centers - 131, Guru Gobind Singh Industrial Estate, Next to Jay coach, Off W.E.Highway, Goregaon (E), Mumbai - 400 063. India. Technical Specification: • Super Bass • Sound: HD Clarity with Super Bass • Drivers: 40 mm • Type: On Ear • Connectivity: Bluetooth / Wireless • Compatibility : All Mobiles , Laptop And Tablets • Microphone: Noise Cancelling • Operation range: 10 meters • Playing time: Up to 8 hours • Standby time: About 100 hours • Charge time: Nominal charging time: 2 hours • Battery type: Rechargeable 250mAh Li-polymer battery • Functions: multiple function of on/off, play/pause, Call receive/reject, Volume Adjustment and Music Track Change Previous and Next • LED indicator status: Blue LED for power and pairing, Red LED for charging • Frequency range: 20Hz- 20kHz • Controls: Volume/USB Charging/Aux Cable Controls on Ear cup • Sensitivity at 1KHz : 110 db • Signal Noise Ratio: ≥75dB • Dimensions:70*180*175mm • Impedance: 32 Ohms (±15%Ω) • Speaker sensitivity: 110±3dB （at：1000Hz 1mW） • MIC. sensitivity ）: -40±2dB （at：1000Hz 2.2KΩ 3V） • Distortion: ≤1% • Extra 3.5mm port: yes (Cable Supplied) • Battery Charging: Micro USB Charging • Rated power：10mW • Net Weight: 110g • Warrantee: 1 year Manufacturer Warrantee • Delivery Includes: Wireless Headphone, Manual , Audio Cable, Charging Cable Does the product have noise cancellation? No, but it has noise isolation. It is like noise cancellation’s younger brother. You will still be able to hear that guy shouting at his phone, only a little muted. You can find out more about it here. What Devices is te product compatible with? The Rockerz 400 is compatible with all kinds of Android, iOS and Windows Bluetooth-enabled devices. It’s like that one guy in your group who can mingle with everyone. Does the product come with mic/remote? Yes, it does. Now you can easily control your music and talk for long on calls.