BrandShoptronicsColourBlackForm FactorIn EarNoise ControlSound IsolationModel NameXiaomi Mi 9TAbout this itemTransmission range: Shoptronics 15m Bluetooth mode: Hands free Headset profile Power charger:AC input 110-240V DC output 5V Radio frequency:2.4GHz Music time:About 12H talking time about 14H Standby time:about 200 HoursVoice prompt: Incoming calls report;Acoustic answer.Yes/no ?Multipoint?:Connect with 2 Phones and use at the same time.Conecting: Boot does not match the case 5 minutes after the automatic shutdown,to switch the machine can be(To Switch the Headset Power on/off To power on:press and hold answer/end key for about 3 seconds until flashes blue To power off:pess and hold for about 6 seconds.goes off)Support voice report number: Shoptronics when phone call coming automatic report telepgone numbers to aviod important telephones. E.g: "1""0""2""4""5""2"phone call coming.Built for your active lifestyle - Shoptronics earbuds can stand dripping sweat. Ergonomic design allows for ultimate wearing comfort to match your active lifestyle like running, jogging, cycling, driving, camping, hiking, gym exercise and other outdoor sports.