WK Headphones M8 Bluetooth Red

Bluetooth version: V5.0Bluetooth frequency: 2400MHZ-2500MHZImpedance: -32ohmRechargeable battery capacity: 200mAhPlay time: 3-4 hoursTalk time: 3-4 hours Standby time: 80 hoursCharging time: 2-3 hoursPower input: 5V-1AMaterial: ABS + PCSensitivity:122dBFrequency Response Range:8-24000HzSupport Memory Card:YesFm radio mode