Product Details:Charging bin size: 6.7*5*.21cmHeadphone size: 4.1*1.5cmBluetooth version: V5.0Wearing method: semi-in-earDrive unit: 10mm moving coilImpedance: 16Ω±15%Charging port: micro-USBSignal to noise ratio: 96dB±3Frequency range: 2.4GHz-2.48GHzTransmission distance: 10 metersButton type: touch operationPacking:charging compartment*1 ;earphones*2 manual*1 ;charging cable*1