✔Kids Bluetooth Headphones with 3 Switchable Volume Limited Levels for Hearing Protection -- Far superior than the regular Bluetooth chip that supports SD card / FM radio, SIMOLIO adopts exclusive proprietary 3-level (75dB/85dB/94dB) volume limiter and advanced Bluetooth CSR chip to protect children's hearing, produce crystal clear sound and help develop children's musicianship. ✔Stereo Wireless Kids Bluetooth Headsets with Flexible Headbands & Noise Isolation -- Adjustable headband with memory stainless steel strips give the headphones some impressive durability and flexibility. What’s more, the extra detachable Nylon fastening straps can be added to the headbands to get the perfect fit for the toddlers. On-ear headphone isolates from outside noise to make you hear clear sound. And we use some nifty engineering to make sure the ear pads won't fall off. ✔Wired Headphones with Universal Compatibility, Great Backup When the Battery is Dead, Never Miss Your Music -- With the standard 3.5mm headphone jack, ideal for using with all the audio devices with 3.5mm aux, including Android smart phones, Tablets and more. Also, the included 3.5mm audio cable can be used when the built-in battery is run out under wireless working status, so that you can still listen to music the old fashioned way. ✔Built-in MIC Bluetooth Wireless Headphones for Children with Additional Sharing Jacks & Multi-function -- kids can have another headphone plug into the sharing jack on the right side of the headphone to share audio with his friends at school/home, travelling or flying. The built-in MIC allows hands-free talking, lets you pick up calls and skip between tracks in the playlist without missing a beat. For Calls: Short press MFB to answer/hang up. For Music: Press MFB to pause/play. ✔Foldable Kids Bluetooth Earphones, Easy to Carry w/ EVA Case, Perfect for Kids Travel and Back to School -- Folding & Compact design,convenient in carrying and storage. Kids can easily fold them up and put them into the hard case. When you take your kids on a trip by car/train/plane, this headphone would be a good companion.15 hrs battery life. USB charging cable is included.