Headsound New Wireless Bluetooth Headphones Headset with LED Display

Condition: 100% Brand NewMaterial: ABSColor: Black, White (Optional)Model: BS-N75Bluetooth version: v4.1Frequency range: 2400.0-2483.5MHZBluetooth mode: headset, hands-free mode, A2DP and AVRCP / Bluetooth chip / JieliBluetooth distance: about 10 metersBluetooth search name: N75Talk time: about 3-4 hoursPlay music time: about 4-5 hoursStandby time: about 100 hoursCharging time: 2-3 hoursCharging interface: Micro USB built-in 300 mAh batteryHorn diameter: 40mmAnti-group: 32 ohmsMicrophone size: 2*4mm directional, multi-directionalSensitivity: -42DBOperating voltage: 3.2v-4.2vDistortion: ? 0.2% 105db (20upa);Channel difference: (?1dbat1000hz)