These do not play any sound. They are not electronic. 【Exceptional Noise Cancellation】After myriad tests by iClever engineers, we combined the 22mm porous sound-absorbing sponge and custom-made honeycomb acoustic sponge together to absorb and reduce noises while ensuring comfy wearing, achieving a SNR of 29dB and offering reductions up to 46dB under certain scenarios. Please note that earmuffs cannot 100% eliminate noise. 【Ultimate Safety & Kid-Friendly 】iClever EM01 reduces sensory overload and other external triggers, perfect for kids with autism or sensory issues. Uses BPA-free ABS material and silicone-free earcups, just use these hearing protection ear muffs with peace of mind. 【Portable & Multi-scenario Applicable】These noise cancelling ear muffs can be folded up for compact storage and easy transport, enabling you to bring them to any noisy scenes, such as monster truck shows, sporting events, fireworks, Concerts and more. 【Absolute Comfortable Wearing】Hours of wearing ear muffs can hurt, which is why we've designed this hearing protection with 18mm-thick slow rebound sound-absorbing acoustic sponge padding covered with skin-friendly leather for greater comfort, the snug-fit headband provides 2/3 less pressure than other average ear muffs. In addition, the holeless pivot frees your worry of hair getting stuck. 【Ergonomics & Durability】Kids grow quickly. That's why iClever ear muffs for noise reduction come with ergonomics telescopic arms, stretching up to 38mm on each side. Perfect for youngsters of all ages. Armed with tough 301 stainless steel and 2mm-thick steel bars, these kid noise cancelling headphones withstand any twist and bend by little hands.
