Hi, we are a long established manufacturer under ISO 9002, ISO14000 certificate by British BSI of kinds of speaker system (especially home theater ),receiver(mobil telephone),loudspeaker and microphone, buzzer. With 13 years of experience in this field, we thus offer top quality OEM products with competitive prices , prompt delivery and after-sales service. It would be much appreciated if you could visit our web and let us know the models you are interested in by return. Look forward to hearing from you and starting our business relationship in the near future.