boAt Rockerz 109 Bluetooth Neckband with 40 hrs Playback,ENx Technology, Beast Mode (60ms), Magnetic Buds, Dual Pairing, ASAP Charge, IPX5 Water Resistance(Active Black). Plug in the powerhouse of music and keep grooving with a playback of 40 Hours. For when the lack of charge puts your mood off, boAt Rockerz 109 is equpped with ASAP™ Charge that gives 10 hours of playback with just 10 minutes of charging.