Item Type: BT Kids Headphone Material: ABS BT: V5.1 Connection Distance: More Than 10m/32.8ft Built in Polymer Lithium Battery: 400mAh Memory Card: Maximum Support 64G (Not Included) Package List 1 x BT Kids Headphone 1 x Instruction Manual 1 x Sound Cable 1 x Charging Cable 1 x Microphone 1Noise Reduction: Children's headphone with comfortable thickened large ear cushions, perfect fit to your ear, to achieve passive noise reduction, reduce sound leakage, blocking noise. 2Adjustable Headband: Bluetooth headphone for children with adaptive stretch adjustment headband, designed for teenage head shape, comfortable to wear, long time use without fatigue. 3Bluetooth 5.1: This kids headset provides Bluetooth 5.1 wireless connection, convenient and fast. Fast and stable transmission, suitable for games, listening to music, etc. 4Foldable And Portable: Wireless kids headset with portable folding design, does not take up space, more convenient to carry. Suitable for travel, sports, school, etc. 5With Microphone And Buttons: This Bluetooth headphone with microphone, rgb light, more interesting. Multifunctional button design, switch songs, adjust the volume more convenient.