Hello, customers who purchased with an auxiliary cable, you need to use the headset to connect to Bluetooth first, and then insert the auxiliary cable after the connection is successful. Support listening songs and answer phone calls. Call reporter, lastest phone number callback, intelligent Chinese and English voice prompt (can be switched), such as power on/off, pairing, low battery, etc. Display power on the Apple mobile phone, you can watch the power of the headset at any time. Support connect 2 mobile phones at the same time; Voice control answer, say Yes"to answer/No"to reject; Once the bluetooth headset has connected to the phone, it will automatically connect back to the phone when it is turned on. Intelligent compatibility: support all mobile phones with Bluetooth function, tablet, notebook. Battery capacity: 90mah Call duration: 8-10 hours Standby time: 200 hours Music listening time: 8-10 hours Transmission distance: 10 meters Charging time: 1-2 hours Package Included: 1 x Bluetooth headset 1 x Charging cable