Logitech FreePulse Wireless Headphones (Discontinued by Manufacturer) 2.4 GHz wireless headphones with Bluetooth 2.0 Enhanced Data Rate technology Delivers clear, interference-free audio with range of up to 33 feet High-carbon, spring-steel headband provides secure, reliable fit Integrated volume controls and Bass Boost mode; soft-touch comfort rings Wireless receiver with 3.5 mm audio plug; 2-year warranty