Features
HiFi Powerful Bass Stereo Sound Effect: 40mm diaphragm speaker drivers, deep bass stereo sound, enjoy the wireless high quality music
Comfortable Over-Ear Fit: Soft protein leather earpad and retractable headband lifts the burdens for your ear. No discomfort after long-time wearing.
Comfortable and Foldable: Technical ergonomics design with soft earmuffs simulated to human skin texture, ensure long lasting comfort
Wireless and Lightweight: Ear Pad headphones for enjoying extended listening of TV and audiowithout disturbing others
Built in Microphone: supports hands-free call and voice reporting incoming call number. With the latest enhanced technology makes you voice sound clearer in noisy environments
Ever Power Off, Both Wireless & Wired: 1. The wireless mode: A built-in 400mAh battery provides up to 10-hr music time or talking time in a single charge; 2. The Wired mode: you can also use it as a wired headphone with the provided audio cable so the headphones will never power off.
Bt 5.0 Adopt: The Bt 5.0 CSR Chipset, lower power consumption, superior compatibility. Compatible for all the mobile Phone, Tablet PC, Notebook, any devices with bt function Or has A 3.5mm Audio Jack
Multi-Functions: headsets have several options for listening enjoyment. Built in TF card slot and you can use a TF/Micro SD card with loaded MP3 music and listen to the songs directly on your headsets.
Colorful LED Light: Seven-color transform cool breathing light, shine everywhere, anytime.

Specifications:
Name:B39
Use: wireless headset, voice headset
BT Version: V5.0
Support BT Mode: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5
Frequency: 2.402-2.480GHZ, 2.4G ISM band
RF Performance: receiver sensitivity: -84dBm; transmit power up to 4dBm
Frequency Response: 20 Hz - 20 KHz
Signal to Noise Ratio (SNR): 70Db;
Total Harmonic Distortion Rate (THD) 0.1%
Power Indicator: Red and blue lights alternately flashing
Headset Charging: rechargeable 400MAH lithium battery
Charging Port: Mini 5-pin USB charging interface
Normal Charging Time: 2.5 hours
Talk Time: up to 10 hours
Standby Time: up to 20 Days
Operating Temperature: -20? - 55?
Other Features: support status indicator, charge indicator display

Note:
Slight color difference is allowed due to different lights and monitors,hope you can understand,thank you!

Package Included:
1* Headphone
1* Charging Cable
1* 3.5mm AUX Audio Cable
1* User manual