For Pioneer Vsx-421 Vsx-521. Vsx-423 Vsx-322 Vsx-521K Vsx-430K Amplifier Audio Video Av ReceiverThis product is a remote control designed for use with Pioneer audio and video receivers. It features wireless IR communication, a frequency of 433 MHz, and comes with a package. The remote control is made in Mainland China and is branded as XSRUPB. It is compatible with the following Pioneer models: VSX 421, VSX 329, VSX 521, VSX 423, VSX 322, VSX 521K, and VSX 430k. SPECIFICATIONS Wireless Communication: IR Use: Audio Video Players Package: Yes