Specification:Type: Bluetooth EarpieceBluetooth Version: V5.1Noise Cancelling: CVC8.0Special Features: Dual connections with two devicesBattery: 500mAhTalking time: up to 12 hoursForm Factor: In EarWaterproof: life waterproofSupport system: All bluetooth devices and mobile phonesCompatibility: Compatible with all electronic devices that support Bluetooth transmission in low latencyAnswer: click the on keyHang up: click the on keyRefuse to answer: Double click the SwitchCancel call: click the on key (used during call)Third party call handover: click the MFB keyContinue the current call and end the three party call: MFB Double clickHang up he current call and Switch the three party call: MFB key three hitCall siri: long press on the on button for 1sClose siri: click the on keyPause/play: click on the SwitchVolume+ : click the volume+ keyNext Song: long press on the volume+ button for 1sVolume- : click the volume- keyLast Song: long press on the volume- button for 1sVideo call turn off the microphone: long press on the volume+ button for 2sTurn on the microphone for a video call: long press on the volume- button for 2sPackage Included:1 * Bluetooth Headset1 * Charging Case1 * Charging Cable1 * User ManualNote:Thecolorsmaybealittledifferenceforthedifferentmonitordisplay.Pleasecheckasmuchaspossibletomakesuretheitemistheonethatyouneed.Pleaseallow0.5-1inchdifferenceduetomanualmeasurement.(1inch=2.54cm)