B39 Portable Foldable Over-Ear Wireless Headphones, equipped with Bluetooth 5.0 and a TF card slot, offer convenient wireless listening and storage options, all in sleek black

Product size: 15*5*19cm Material: Plastic Include: earphone*1， manual*1， charging cable*1 Speaker size: 40mm Transmission range: within 10 meters Output power: 35mW Frequency response: 50HZ-20KHz FM frequency: 87.5-108MHz USB charging: DC5VIN Version: 5.0 wireless microphone Adaptive Noise Cancelling Headphones Bluetooth 5.0 Headphones Long battery life Smart call， high fidelity music Simple， individual， business， leisure， cute