Feature:

(1)This device has supported 8GB Memory flash drive,It is able to upload music, allow you to listen to your favorite music without the phone during a workout or other activity;
(2)Easy to connect to any Bluetooth devices/phone,Listen to songs,answer calls,voice control;
(3)For use in salt & fresh water up to 2-meters deep, Sweat resistant, dust proof design endures through the toughest training conditions;
(4)Ergonomically designed for a secure fit and long-lasting comfort, Ambient noise function so you aren’t isolated from the world around you, Up to 12-hours playback;
(5)Small and portable, easy to carry and store

Specifications:
Support system: Windows98/2000/XP
Supporting documents: MP3, WMA,FM radio
USB interface: Hi-Speed USB 2.0; can charge and transfer files to MP3 headphones
Memory capacity: no memory, plug-in type, maximum support 8GB, adapt TF card / micro sd card
Charging power supply: computer USB port DC 5V; DC 5C (500mA) travel charger; DC 5V (500mA) car charger
Battery: DC 3.7V; rechargeable lithium ion polymer battery
Continuous working time: about 4 hours; (varies depending on usage)
Charging time: about 2-3 hours; (differs depending on the use of charging equipment); charging time should not exceed 3 hours
Frequency response: 2.402GHZ~2.480GHZ
Signal to noise ratio: >85db
Working environment temperature: 0 ° C -45 ° C

Packing Content:
1 x Sport Headphone MP3 Music Player (Choose the color you like)
1 x USB cable

Q & A:

1)Q:How do you load the music?
A: In that issue it is very friendly, much better than using I tunes, because you can just copy and paste your music, from some file of your PC to the music file of the Sony Walkman, and the music is ready to listen.
2)Q: I am looking for similar but suitable for fitness and running. What can you recommend folks?
A: Works great!
3)QCan you use these with Google play music?
A: This unit does not support applications and has its own memory to store audio file. It is not compatible with external device connection other than a computer to transfer audio contents.
4)Q:I am an outdoor runner. Does this earpiece allow outside noise while listening at normal volume? I am concerned about impaired situational awareness.
A: Hi there, You can set AVLS (Automatic Volume Limiter System) to limit the maximum volume to prevent auditory issues or distractions such as leaking noise at high volume, oppressive feeling in the ear, and danger from blocking outside sounds.