Specification: Type: Bluetooth Earpiece Bluetooth Version: V5.1 Noise Cancelling: CVC8.0 Special Features: Dual connections with two devices Battery: 500mAh Talking time: up to 12 hours Form Factor: In Ear Waterproof: life waterproof Support system: All bluetooth devices and mobile phones Compatibility: Compatible with all electronic devices that support Bluetooth transmission in low latency Answer: click the on key Hang up: click the on key Refuse to answer: Double click the Switch Cancel call: click the on key (used during call) Third party call handover: click the MFB key Continue the current call and end the three party call: MFB Double click Hang up he current call and Switch the three party call: MFB key three hit Call siri: long press on the on button for 1s Close siri: click the on key Pause/play: click on the Switch Volumeand : click the volumeand key Next Song: long press on the volumeand button for 1s Volume- : click the volume- key Last Song: long press on the volume- button for 1s Video call turn off the microphone: long press on the volumeand button for 2s Turn on the microphone for a video call: long press on the volume- button for 2s Package Included: 1 x Bluetooth Headset 1 x Charging Case 1 x Charging Cable 1 x User Manual Note: Thecolorsmaybealittledifferenceforthedifferentmonitordisplay. Pleasecheckasmuchaspossibletomakesuretheitemistheonethatyouneed. Pleaseallow0.5-1inchdifferenceduetomanualmeasurement.(1inch=2.54cm)