Now just stop worrying about Wires hanging from here and there. Pair with any Bluetooth device, connect and play. Dead Batteries can kill your vibe. boAt Rockerz 518 is designed to play Up to 10 hours. Don't just be loud, be loud and clear. We assure you have not heard such powerful bass and vocal clarity from a wireless headphone with Extra Comfort Ear cups. The boAt Super Bass Rockerz 518 Wireless Headphones will make your listening experience personal and for real. So, just plug it in and Plug into Nirvana.