Main features:
Bluetooth 4.1, better connection than other same price headsets
Listen to music and have long term phone calls, do not worry about the battery
Connect 2 smart phones at the same time
Line in and line out function, more fun and magic around you
Support micro SD card and FM function (this is an advanced version of this headset)
Install app to control the headset

Product details
Connectivity: wireless
Connecting interface: micro USB, 3.5mm
Application: mobile phone, computer, portable media player
Plug type: full-sized
Driver unit: 57mm
Frequency response: 20-20kHz
Impedance: 16 ohms
Sensitivity: 110dB
Working time: talktime 45 hours, music playing time 40 hours
Standby time: up to 1625 hours

General:
Brand: OEM
Model: SKU :128758804
Color: black, white, red, blue
Wearing type: headband
Functions: Bluetooth, microphone, MP3 player, answering phone, song switching, Hi-Fi, FM function

Extended function:
FM radio: yes
Bluetooth: yes
Bluetooth version: V4.1
Bluetooth protocol: A2DP, AVRCP, HSP, HFP
External memory: TF card