There is voice prompt for pairing, call, on/off. Button has functions of language change, call on/off.The earphones are comfortable in the ears, and will not be painful when worn for a long time, and they will not fall off easilyThe wide compatibility allows the headset to be easily matched and connected with the device you are using, simple to use and easy to operateWhether as a gift to a friend or to yourself, this will be a great value choiceItem Name: EarphoneMaterial:ABSBatteries: 50mAh Battery (Included)Sensitivity: 98士3dBBluetooth: 5.0Frequency Response: 20Hz-20KHzWaterproof Grade: IPX5Frequency Range: 2.40-2.48GHzBluetooth Transmission Distance: 10mWearing Way: In-ear/Hidden EarphoneMicrophone: SupportHorn Specifications: 8mn Copper RingDistortion Rate: ≤1％Size:2cmx1.6cmx1.4cm/0.79inx0.63inx0.55inNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.This is not a TWS headset, it cannot connect to 2 mobile phones at the same time!Package Includes:1 X Earphone1 X Ear Cap1 X User Manual1 X Charging Cable