boAt Nirvana 751 ANC,65Hrs Battery,Hybrid (~33dB),Fast Charge,Ambient Sound Mode,Button Controls,Immersive Sound,Carry Pouch,Bluetooth Over Ear Headphones,Wireless Headphone with Mic(Gunmetal Grey)Features Active Noise Cancellation Say adios to the chaos with Active Noise Cancellation feature and elevate the vibe to a whole new level of pleasure with Nirvanaa 751ANC, delivering up to 33dB Hybrid ANC.; Battery Time Stay connected to your playlist for mammoth durations, every day with up to 54 hours of playtime in ANC mode and up to 65 hours in normal playback mode. ASAP Charge This headphone comes equipped with our ASAP Charge technology that