... , much better than button batteries. Built-in sound wave vibration system, can make a quick, careful and fluent make- ... =====About us:• Headcount: 200 workers, 8 R&D/Engineering, 10 sales persons• Main Products: consumer electronics• Main Customers: Cosco ( ... , Risou, Imotani• Main business market: 50% US + 40% Japan+ 10% Others• Certification: Factory audit Passed by BV, SSIC• Revenue : about ...