42dB Hybrid Adaptive ANC: Escape to the audio realm away from the noise with the boAt Rockerz 551 ANC Pro Bluetooth Headphones. Innovative hybrid adaptive ANC analyzes your surroundings to cancel up to 42dB of sounds for noise-free unwinding. 72 hours of Playback: Get 72 hours of uninterrupted listening with your Rockerz 551 ANC Pro. Sing along to the latest tracks or converse with your squad for hours on end without charging woes. 40mm Drivers: Immerse into thumping audio with the powerful 40mm drivers in these headphones. Be it fast-paced chase sequences or punchy tracks, bass-rich boAt Signature Sound from the dual drivers is bound to elevate your experience like never before. 2 Mics with ENx Technology: Take calls from wherever you are without searching for an isolated spot. Whether you are in a busy room, airport lounge, or at the office, these headphones lend hassle-free communication with 2 ENx-powered mics. Bluetooth v5.4 Compatibility: Enjoy supreme wireless comfort with Bluetooth v5.4. Wear your Rockerz and watch movies while commuting or even call your loved ones comfortably! boAt Hearables App Compatibility: Level up your listening with upgraded ease of use on the boAt Hearables app. Control sound parameters to your liking and unlock maximum enjoyment for all entertainment types. Quick Access Controls: Dive into effortless listening without reaching for your phone thanks to the quick access control buttons on these headphones. Toggle ANC modes, answer calls, manage playback, change the volume, and do more with simple taps.