● implementation of three-dimensional structure of the sound! 

Wear Type: Neck
Speaker unit unit: 
* Type: open 
* Driver Size: 14.8 mm 
Cable: 
* Removable Necklace 
Plug: 
* Type: L-shaped 
* Diameter: 3.5 mm 
Standard: 
* Maximum input: 50 mW 
* Sensitivity: 99 dB / mW 
* Resistance: 16 Ω 
* Frequency range: 20 ~ 20,000 Hz 
Weight: 20 g