OTL HP0624 Harry Potter Back to Hogwarts Junior Headphones are designed for listening to music, watching movies and playing games. These headphones have been restricted to 85 db and have been tested/passed as suitable for children aged between 3 - 7 years. These headphones can be used with all your favourite devices using a 3.5mm universal jack connector. (I.e. Use with ipads, ipods, tablet, handheld games, learning devices, 2ds xl and nintendo switch). Features adjustable padded headband with soft touch ear pads for comfort. It is easy to use and durable. Specification: speakers: 30mm drivers, frequency response: 20hz - 20khz, impedance: 32 ohm, sensitivity: 85db ± 5db, power capability: 50 mw, rated power: 5 mw, connector: 3.5mm plug, cable length: 0.9m.