Shuangqi (ENC) Jerry solution: JL6973D4/Bluetooth: 5.3/Bluetooth distance: 10m/frequency response range: 20HZ-20RHZ: Speaker sensitivity: 114 Shi 3 d13: earphone battery: 30 twist (MXD brand battery): charging case battery: 250MAH plus protection C: Playback time: 4.5-6 hours/call duration: about 5 hours: charging case times: 3.5 times: power input port: TyPE-C ports: antenna Type: ceramic antenna: MlC specification: 4 silicon microphone: Button mode: smart touch button type: earphone size: 29 x23.5x21MM: charging bin size: 56 x45x28mm: Bare Metal weight: 36.8 g/box gauge parameters: 46.5 x31.5x39.5cm/box weight: 9.4kg/product color/white/black/yellow/blue