About this product: Bluetooth Music Receiver/Micro SD Player/Bluetooth Call/3.5mm Headphones. Bluetooth mode, built-in microphone. Foldable, soft and comfortable: adjustable length, suitable for different sizes. The ear cups are made of skin-friendly leather, super soft ear cushions, more comfortable to wear for a long time. Equipped with colorful LED lights, after power on, long press the play button to turn the light on or off. The LED light will flash with the music. Bluetooth 5.0 connection, compatible with most smartphones, 33 feet (about 9 meters) connection range allows your kids to enjoy wireless freedom! This Bluetooth headset has a built-in 400mAH battery, which can provide about 8 hours of talk time and 180 hours of standby time. It can be fully charged in just 1 hour. No need to worry about running out of power while playing music. At the same time, the 3.5mm audio interface allows you to enjoy music even if the headset is out of power.