Bluetooth adapter for Alpine KCA-121B AI-NET car stereo1、Fitment: This bluetooth AUX adapter comes with all the new design, perfect replacement for Alpine CVA‑1004 IVA‑D300 IVA‑D900 INA N333 INA N333RS RRS DVA‑7996R DVA‑9860R DVA 9861Ri DVA‑9965R IDA‑X100 IDA‑X200 IDA‑X300 iDA‑X301 iDA‑X303 iDA‑X305 IDA‑X311 IDA‑X313 CDA‑7893 CDA‑7894 CDA‑7998 CDA‑7998R CDA‑9535R. 2、Signal Transmission Improvement: Bluetooth master chip and audio digital processing chip are used to ensure that the audio signal transmission is not distorted and the audio quality can reach the high definition standard. 3、Plug and Play Style: Install the bluetooth audio cable via original CD changer port, which is easy and fast, perfectly integrated with the car. 4、Hifi Sound Quality: The bluetooth audio receiver is connected to car stereo via wire harness, no interference and no loss of sound quality, and is comparable to the original CD sound. 5、Noise Reduction: With a enhanced signal receiving circuit, this Bluetooth aux adapter can be connected pretty fast in long distance, and provide stable and continuous audio sound, and the noise cancellation circuits can make the sound quality much purer and true.