JoYin electron limited company acts as an agent for feverish grade automobile amplifier of Danmark company. There are some installation automobile amplifier of technians ,international amplifer competitions of judgments .They are mainly occupied with automobile airproof,amplifier refit,fixing work,adjustment work. Our product as follow : 1.Feverish grade automobile digital amplifier series 2.Specific stage of amplifier series 3.Automobile horn series 4.Many holes (laster /digital/audio frequency)digital power disposal (80w-1000w)signal/ noise 100dB JingJin Electron Factory ( in JoYin Electron Company ) : 1. JingJin electron factory mainly occupied with processing materials supplied by 　 clients and producing OEM, ODM for some factory . 2. Our products have been followed ISO9000 international quality .