Beats Solo Pro Wireless Noise Cancelling On-Ear Headphones - Red (MRJ72LL/A) Beats by Dr. Dre Solo Pro Wireless Noise Cancelling On-Ear Headphones. Red version. Model: (MRJ72LL/A)Features:- Active Noise Cancelling (ANC) blocks external noise- Beats Pure ANC adapts to external noise and fit while preserving audio quality- Transparency helps you stay aware of your surroundings while listening- Advanced acoustic system delivers powerful sound with balanced tonality- Up to 22 hours of listening time (up to 40 hours with ANC and Transparency turned off)- Fast Fuel provides 3 hours of playback from a 10-minute charge when battery is low- Auto On/Off when you unfold and fold your headphones