Product details of Oneplus Bullets Wireless-ZHanging Neckband Bluetooth Sports Headset Sports Type R60· Model : R60· HeadphoneType : In-ear Headphones· BluetoothProtocol : A2DP/AVRCP/HSP/HFP· Music Time: 6 Hours (related to playback volume)· Call Time :8 hours· StandbyTime : Up to 80 Hour· FrequencyRange : 2.4GHz-2.48GHz· FrequencyResponse : 20Hz-20KHz· BluetoothDistance : About 10 meters· BluetoothVersion : V5.0· Built-inMicrophone – Safe and Flexible Ear Hooks, Ideal for Sports or at the gym.· MultifunctionalControl Button – more Convenience with Smart Control.· HighQuality Microphone – AMR WB (Adoptive Multi Rate-Wide-bond) in-crease theFrequency to 50Hz-7Khz or evenHigher, Provide more Natural Sounding Voice Calls.· LegendarySound – High Quality Sound Brings you a Dynamic Audio Experience.· SculptedEarpieces – Sculpted Earpieces with Multi-ftizo Tips Provides Unprecedented fitand Comfort.· NoiseReducing Microphone – Stereo with Noise Reducing Function· Free :Finger Sleeve