The RC4Magic S3 DMXio transceiver gives users best in class data security and reliability in the 2.4GHz bandwidth along with the RC4 Two-Year Warranty.  All RC4 products come with a private, secure RC4 Secure Private System IDs, which means that no other wireless system can trample your signal. The DMXio has an internal antenna; the DMXio-HG has an external antenna for range extension. included in delivery: AC power supply