Specifications: Brand Picun Model X7 Color Black Wearing Type In-ear Microphone Yes Volume Control Yes bluetooth Version V5.0 bluetooth Chip ATS3009 Supported Profiles HSP/HFP/A2DP/AVRCP Transmission Distance 33feet (10m) Receive Sensitivity 97dB Frequency Response 20-20K Hz Battery Capacity Earbud: 50mAh*2 Charging Box: 500mAh Charging Time (h) 1.5h MusicTime 5h Charging Interface Type-C PackageIncluded: 1*Picun X7 TWS Earbuds bluetooth Earphone with Charging Box 1* Charging Cable