New Bluetooth Headset Ear-mounted Business Stereo Headset Hands-free Sports Headset With MicrophoneFeatures:Long battery life, noise reduction Bluetooth compatible headsetThe built-in 85 mAh polymer lithium battery is equipped with Bluetooth compatible Smart 5.2 chip, which reduces power consumption by 70%, and bid farewell to frequent charging troubles.Powerful composite power diaphragm, automatically filter external noise, clear calls with bilateral microphones180 rotating earpiece, free to left and right ears and adjust the angleGo to 0 delay silky experience, play games with simultaneous audio and videoProduct Description:Specifications:Bluetooth name: air5Bluetooth version: V5.0Supported protocols: a2dp avctp avdtp avrcp hfp spp att gatt rfcomm l2cap profileBluetooth usage frequency: 2.402G-2.408GBattery type: polymer batterySignal-to-noise ratio: 92DBSensitivity: 90DBTransmission distance: more than 10mControl mode:Power amplifier: ClassHeadphone battery: 85MAhPlay time: 15 hoursHeadphone charging time: 1-2 hoursHorn specification: 0809 32 Audio range: 20HZ-20KHZDistortion: less than 1%Color: blackCharging interface: type-cComfortable Can be worn on both left and right earsPackage:1x Bluetooth headset1 x charging line1 x user manual