content: 420 to 450 MHz You can also to choose not to encript. How does the encryption work? Encription is done via Software on your PC the Physical Device that you get is more like an Transmitter with some benefits. btw they said they will make the source code open source here the text from the Kickstarter.  If you have entered an encryption password, then all your messages and files will be encrypted with AES-256. RATS also uses a randomized salt, which means that all encrypted data will generate unique encrypted strings. For example if you send exactly the same message 100 times with the same encryption password, the encrypted data will always be unique, even though it contains the exact same message. Frequency List The idea behind the frequency list is to allow users to download the latest frequency list (frequencies.xml) that contains a list of which frequencies you can use in a specific country. This list will be updated and maintained by the users of RATS with an easy-to-use interface.  Specifications Frequency: 420-452Mhz Max Transmitter Power Output: 100mW | 20dBm Modulation: FSK Transfer speed: 2.40KB / sec Information transfer speed: > 1KB / sec Range: approximately 1 km with 100mW TPO in an urban area with the standard antenna. With better antennas and less obstacles in the path you can reach 5-6km.