Children Learn To Wear Cute Little Dinosaur Pattern, Colorful Effect, And Emitting Headset With And Mark Features: 1)【HI-FI, SOUND QUALITY】- The closed-back design of bluetooth headphones provides immersive Hi-Fi sound with BLUETOOTH V5.1 chip ,which make exceptional sound reproduction and wide range to provide outstanding sound quality, and strong, crisp and clear highs. 2)【COMFORTABLE AND FOLDABLE DESIGN】- Comes with extremely soft Memory-protein ear muff ensuring lasting comfort when you using this wireless headset. Folding and lightweight design makes the wireless bluetooth heasphone easy to be carried and stored.It is suitable for use on trips,vacation,or any other place,achieve enjoy music everywhere and any. 3)【Natural Sound Production】High-definition stereo headphones, specially developed software and noise-cancelling technology, are designed to heated ambient noise, allowing you to focus on what you want to hear. yourself in immersive music even at the lowest volume levels! The goal of delivering superior sound quality to constant pursuit. 4)【Long play time】- Playing up to 20 hours, and continue talk up to 15 hours, Charging 2.5 hours 5)【Widely use range】- Compatible for almost all the mobile phone, tablet PC, notebook, almost any devices with bluetooth function. 6）【afe volume】: take earphones to surf the Internet and do not the wonderful details of the teacher, so that children can learn more attentively and efficiently. Product Description: Parameters: Bluetooth version: V5.1 Working distance: 15m Headset battery: 400mah Battery life: 10 hours on and 20 hours off Charging time: about 2.5 hours Frequency response: 20Hz-20KHz Horn output power: 10MW Signal to noise ratio: ≥ 80dB Sensitivity: 105 + 3dB Working voltage: 3.5-4.2v Working current: 30mA Charging interface: 5v2a Input interface: USB / 3.5 + 4P stereo / microphone contain: 1X headphones 1X charging cable 1X instruction