Two different sound volume settings of 85dB and 95dB for the perfect volume setting in any environment. Built-in 500mAh battery provides up to 24 hours of battery life. Fully charged in about 2 hours via USB Type-C charging cable. A working distance of 10 meters.Suitable for ages 3 and up.Stretch adjuster for a custom flexible fit for any head shape. Lightweight, durable, foldable, flexible and comfortable swivel design when in use