Wireless Bluetooth Sport Stereo Earphone Built-in Microphone For Smartphone

Features:
The latest version V4.1
Support for Bluetooth stereo music playback (A2DP)
You can adjust volume by pressing "+" and "-" buttons.
Noise cancellation, high-velocity element for excellent stereo effect.
Small size, easy to take outside.
-92dBm RX sensitivity and +9dBm TX output power capability
24 bit Audio codec, -98dB SNR

Specifications:
Color: white
Bluetooth:V4.1+EDR
Bluetooth Headset & Hands-free, A2DP, AVRCP
Operating Range:10M, Class2
Output: DC5V/100MA-1A
Fit Design: In-Ear Only

Instructions
1. Power: Press the power button for 2-3 seconds, along with red and blue lights, boot into the back even state
2. Power Pairing: Press the power button for 5-6 seconds, along with red and blue lights, after flashing red and blue alternately into pairing mode
3. VOL +: Press the volume + button for 2 seconds, add up the volume a maximum sound, a warning sound
4. VOL-: Press Volume - button for 2 seconds, cut down the volume a minimum sound, a warning sound
5. Previous: Press VOL+
6. Next: Press VOL-
7. Telephone Answering: when to call, press the power button
8. Refused to answer: when to call, press the power button for 2 seconds
9. Redial last telephone number: double-click on the standby power button
10. Charging: red light when charging, fully blue lights

Package Includes:
1 x Bluetooth Stereo Headset(other accessories are not included)