Specification: 1. Power supply: Batteries( AAA 1 .... Speaker : .40mm* 2 6. Signal to noise ratio: > > 75db 7. ENV-friendly stuff: ABS plastic Welcome OEM & ODM....
wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww Welcome OEM & ODM