Brand: Bluedio Model : CI3 Color : Assorted Colors Wearing type : In-ear with ear hook Function : Song switching, Microphone, Answering phone, Bluetooth, Waterproof, Noise Cancelling, Voice control Connectivity : Wireless Application : Computer, Mobile Phone Plug Type: Bluetooth Cable length : No Driver unit: 10mm Sound channel: Two-channel (stereo) Frequency response : 20~20KHz Impedance : 16ohms Sensitivity : 110dB Power supply: Built-in rechargeable battery Working time: 5 hours Talk Time: 5 hours Music Time: 5 hours Standby time: 160 hours Charging time: 1 - 2 hours