FREE: Wireless MP3 Player Bluetooth Headset Sunglasses Driving For Cell Phone

The listing, Wireless MP3 Player Bluetooth Headset Sunglasses Driving For Cell Phone has ended.

These were a gift to my boyfriend, from his sister. They did not come with a user's manual. They seem to be unbranded. USB cord included.

I looked up the following information online:
Import Polaroid polarized Lenses provide the best protection for eyes in. Effectively prevent ultraviolet rays and harmful blue light.
4GB internal memory.
Support of MP3/WAV/WMA diversified musical formats.
USB 3.0 high-speed interface with faster and convenient transfer.
Freely telescoping boom speakers, 270 rotatable, freely adjustable and comfortable wearing.
High quality surround sound for MP3 playing and phone call.
Built-in 150mAh high capacity polymer lithium battery provides 5 hour continual MP3 playing, 3 hour talk time through Bluetooth and Bluetooth standby time of 5-7 days.
Used for various occasions and potable with compact size.
Comply with Bluetooth protocol V2.0.
About 2-3 hour continual charging time.
10 meter effective distance of Bluetooth and noise reduction.

Specifications:
Internal memory: 4GB
Interface: USB 3.0
Output power of earphone: 5MW
Continuous playing Time: 5 hours(approx.)
Talk time: 3 hours(approx.)
Effective distance: 10 meters
Battery type: 150mAh high capacity polymer lithium battery
Charging time: 2-3 hours(approx.)
Size: 14.5*4cm