Basic parameters:
1. Material: Acrylic + Wool
2. Channel: stereo
3. Weight: 130G
4. Function: battery display, call function, support music
5. Suitable season: winter
6. Suitable size for head circumference: 56-58CM
7. Accessories: USB data cable + manual
8. How to use: head-mounted

Bluetooth features: (only suitable for Bluetooth hats and headbands, gloves, snoods)
1. Bluetooth protocol 5.0
2. Support Bluetooth call, Bluetooth music
3. Low power consumption and high quality stereo sound
4. Built-in lithium ion battery, MICRO USB charging function
5. LED light working status display
6. A wide range of users and simple operation settings

Bluetooth parameters:
1. Wireless transmission distance: 10M
2. Battery capacity: 180MAH
3. Frequency range: 20-20KHZ
4. Sensitivity: 95DB
5. Impedance: 32 ohms
6.Speaker size: 32MM
7. Charging time: 2H
8. Voice continuous talk time: 4-6H
9. Bluetooth music playback time: 3-6H (at 70% volume state)