1.Built-in Mic & Great Compatibility : wired headphones work with the build-in HD microphone for hands- phone calls. These over-ear headphones for support a wide range of devices with 3.5mm audio jack like Chromebook, Kindle Fire, Switch, iPad, Smartphone, MP3/4, Study Tablet, Laptop, PC etc. 2.Stereo Sound & Premium Comfort : With premium made 40 mm driver units, the headphones have a full, balanced stereo sound to allow to immerse in every detail of the audio. Additionally, a padded, adjustable headband and cushioned ear caps give the little one all-day comfort. 3.85/94 dB Optional Volume Limiter : 's ears are vulnerable to sound damage, hence choose the 85dB volume limiter for daily use. If the child is in a noisy environment like car or airplane, please adjust the limiter to 94dB for crystal clear sound. 4.Kids Welfare : It only weighs 6.1 ounces, so it is a lightweight design for aged 3 and up, and won't become their burden. The wonderful sound is matched by standout comfort. Plus, headphone is an ideal companion for sound occasions.