Bluetooth ANC Headphones Research & Development manufacturers - Honsenn. After designing headphones and earphones for clients for over 16 years, Honsenn has the know-how needed to process sophisticated orders.Honsenn's R&D team includes 30 engineers in mechanical, electronical, acoustic and software engineers, promptly delivering customization services.We support OEM & ODM orders, 5 days sample-making, and 30 days MP delivery after the samples are confirmed. Factory Running Management: Honsenn has around 4 project managers monitoring & pushing every project to follow schedules, who worked for big companies like Yamaha, Sennheiser and Philipe.