Features:
BT 5.0 high data transmission speed, stable connection, low power consumption.
Over ear design, comfortable earmuffs, long wear without pain.
The headband is adjustable, suitable for people of different head types.
Support BT, TF card and AUX IN multiple playback modes.
Built-in HD microphone, Hands-free, delivers clear voice.
Specification:
Brand Name: SODO
Model: SD-1007 
BT Version: V5.0
Operation Range: Up to 10 meters (no obstacle)
Frequency Response: 20Hz-18KHz
Impedance: 32Ω
Battery capacity: 3.7V 400mAh
Speaker Size: 40mm
Charging Input: DC 5V
Working Time: 8-12 hours
Charge Port: Micro USB
Color: Black, Grey, Brown, Silver(Optional)
Headphone Weight: 177g / 6.2oz
Package Size: 20.5 * 19.5 * 9cm / 8.1 * 7.7 * 3.5in
Package Weight: 304g / 10.7oz
Package List:
1 * Headphone 
1 * USB Cable
1 * User Manual(Chinese&English)