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 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. 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 For more Enquiries: Contact:8838696767