Untangle your mind and relax with crisp, personal audio without wires, They also feature a comfortable headband and long battery life up to 25 hours, Best of all, one simple setup is all it takes to achieve optimal RF signal reception and you"re on your way to cordless freedom, Wireless FM headphones for cord-free listening, 40mm driver units for expressive sound, Easy-adjust headband for long term comfort, Noise reduction system for minimal transmission noise, Automatic tuning for optimum signal reception, SKU: DSI1080