USAMS YI Series TWS Earphones

Brand: USAMSModel: US-YI001Bluetooth version: 5.0Impedance: 32Connection distance: 10 metersFrequency response: 20Hz-20KHzSensitivity: 115dB 3dBContinuous talk time: about 4 hoursContinuous playing time: 3.5-4 hoursHeadphone power: 40mAhStandby time: 80 hoursHeadphone charging time: about 1 hourCharging bin power: 300mAhCharging bin input: 5V-1ACharging bin charging time: about 1 hour