Folding electronic headphones with red cups. Ability to adjust the sound intensity separately in the two ear cups. Steel headband with soft padding, excellent protective capacity and comfort. Can be connected to a radio with a 3.5 mm jack. Complies with EN 352-4. Weight: 360 g. Can be connected to a mobile phone via Bluetooth 4.0. Battery life with Bluetooth inactive: 180 hours. Battery life with Bluetooth active: 50 hours. Operates with 3 included AAA alkaline batteries. Gross weight: 655 grams.