Super-cool and super-sleek, these foldable, wireless black Dark Knight headphones are ready for action. Officially licensed, they are the ultimate in cool gear. Great for teens and adults, they’re perfect for watching movies and playing games too. Featuring the latest Bluetooth technology with a built-in microphone, these wireless headphones have a play time of up to 30 hours and a working distance of 10 metres. They are comfortable and adjustable and offer superb sound quality at 100 dB. They can also be used with the wire attached if required. Features and Benefits Wired Option for Long Journeys - They can also be used with the wire attached if required for instance on plane journeys. Bluetooth - Featuring the latest Bluetooth technology these wireless headphones have a playtime of up to 30 hours and a working distance of 10 metres. Comfortable - They are comfortable, adjustable and offer superb sound quality at 100 dB Specifications Official DC Comics / Batman Merchandise Speakers: 40 mm Drivers Frequency Response: 20 Hz - 20 KHz Impedance: 32 ohm Sensitivity: 100 dB Bluetooth version: V5.0 + EDR Battery: 500mAH, Lithium battery Working time: 30 hours Operation Distance: 10 metres Headphone Dimensions: 16 x7.5 x 18.1 cm Headphone Weight: 198 g Packaging Dimensions: 18.3 x 8 x 20.8 cm Weight: 325 g Colour: Black