Our products are Short-range, low-power, semi-duplex, transparent wireless RF modules working on ISM frequencies (433/470/868/915MHz). It provides UART TTL (or RS232/485) serial port to be connected with your devices like computers, handheld terminals, remote controllers or display facilities etc. Signals will be transmitted transparently from one module to another, among which the distance could be meters or miles. With our application, you are able to setup a simple wireless transmission efficiently, and the cost is quite low. If you want to know more,welcome to visit our homepages www.sunrayrf.com which including the newest informations and the latest products.