Wireless Bluetooth 4.1 stereo headphone, supports TF card/FM function for smartphone
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 smartphones at the same time
Line in and line out function, more fun and magic around you
Support micro SD card and FM radio 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: 16ohms
Sensitivity: 110dB
Working time: talktime: 45 hours
Music playing time: 40 hours
Standby time: up to 1625 hours

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

Dimension and weight
Product weight: 0.228kg
Package weight: 0.530kg
Product size (L x W x H): 18.60 x 8.50 x 20.00cm/7.31 x 3.34 x 7.86 inches
Package size (L x W x H): 21.00 x 22.00 x 9.00 cm / 8.25 x 8.65 x 3.54 inches

Package contents: 1 x earphone, 1 x audio cable, 1 x USB cable, 1 x bilingual user manual in English and Chinese