Lightweight, foldable and adjustable in size,  they can easily be popped into any bag and making them perfect for holidays and trips away. Totally Kids Safe with built in sound limiter to 85dB. Fully compatible and easy to use with all audio and video players with headphones jack output. Features:Sensitivity of 85 dB to protect your hearing Very light, you can take it everywhere with you.You can adjust the size so that it fits perfectly on your head Handy folding design: you can store it easily in your bag Frequency response: 20Hz-20kHzImpedance (acoustic resistance): 32 OhmCompatible with all audio and video players with a headphones jack output. Contains: Spiderman Stereo Foldable Headphones Age: 3+Batterries: N/A