Sound track：

• 2
• 2.1
• 5.1
• 2.1+1
• 1
• 2.2
• 1.1
• 4.1
• 3
• 2.2+1
• 7.1

More

Charging type：

• USB charging
• Lithium battery
• External adapter
• Other

Computer hardware：

• Multimedia voice box
• Sound adapter

Material：

• Plastic
• Metal
• uv stoving varnish
• Wooden
• Fine copper
• Aluminium alloy
• Rubber
• Silica gel
• Other