Features:
Channel stereo
Usage earbud
Support for music， voice control， multi-point connection
with A2DP / AVRCP high-quality stereo audio transmission and remote control protocol
Powerful noise noise cancellation circuit (active noise reduction)
Wired and Bluetooth automatic switching， support for audio input
Four hours of talk time
3 hours Music time
3-5 days standby time
1 hour Charging time: power indicator Charging: Blue light lights， fully charged: blue light is off

Specifications:
Bluetooth Version: Bluetooth v4.0 + EDR
Drive: 40 mm
Impedance: 32 OHM
Power Level: CLASS II
Output Power: 30mW
Bluetooth distance: 10 m Accessible
Frequency response: 20-20000Hz
Operating voltage range: 3.0V-4.2V
Charging power supply: DC5V Power (computer USB port， mobile phone charger， car charger)
Microphone Sensitivity: -42dB
Dimensions: 18 x 25 mm(Diameter x length)
Net Weight: 23g

Package Contents:
1 x Ear Plug-in Mini Bluetooth Headset
1 x ear hook
4 x ear plugs
1 x cable