Model : i7S TWS (medium) Multi-function button MIC/Android Charging port Wireless Version : V4.2+EDR Battery Capacity : 65mAh/350mAh Input : DC5V Transmission Distance : 10M Plying Time/Talk Time : 2hours (depends on the volume) Charging Time : 2 hours Standby time : up to 100 hours Listening to the song correct, support songs and call. Power capacity will show on your Iphone, you can see the power situation anytime, do not worry about the electricity ,make your life without worry. One to two connections, can be connected to two mobile phones at the same time. Bluetooth headset connected to the phone after the shutdownand then open the Bluetooth headset will connect back to the phone automatically . support all Bluetooth mobile phone, tablet, notebook, singing it, QQ music, movies, etc. Powerful noise de-noising circuit (active noise reduction). Brand I7S SKU 100566442_NP-1020966371 Model i7S TWS (medium)