As an addition to its Cerulean F1 wireless earphones and Cerulean TX+RX wireless transmitter and receiver set, iSkin will also be selling a standalone version of Cerulean RX ($90), which like the TX+RX package is capable of connecting to an iPod-ready speaker system to receive Bluetooth 2.0 audio from a separate broadcasting device. Stereo minijack and RCA cables are included with this version of RX, as is a USB cable for connection to a self-supplied…