About this item [Safe volume technology 85db] Integrated volume control circuits, they ensure that the sound is at safe levels for the eardrums and the internal ear of small children at 85 dB. [LED flashing on / off] You can choose to deactivate the flashing of LED to reserve more battery for a longer music reproduction.Theless for universal compatibility: with the 3.5 mm standard headphones, it works practically with all smartphones [Light & portable & folding] cat headphones are easy to store and transport, you can be folded by 90 degrees from the outside to the inside or upwards. The headphones are made with ear pads padded with foam for a comfort prolonged. [Convenient to transport] The folding design makes it comfortable to transport, you can easily put it in the suitcase or bag, easier to transport. When you take your children out for a trip, take a car. Taking a plane, this cap would be a good partner. [Large compatibility] The cat headphones work with all smartphones, tablets, computers with 3.5 mm jack, such as iPhone, Android cell phones etc.