This antenna can be used to increase the range of the Homematic CCU1, CCU2, CCU3, CHARLY radio module and RaspberryMatic. For all devices that work with the 868 MHz or 433 MHz frequency. This compact omnidirectional "rubber duck" SMA antenna offers wide coverage and 2dBi gain. It is a coaxial sleeve design with an omnidirectional pattern. This antenna features a tilt-and-swivel SMA connector so they can be used vertically, at right angles, or at an angle in between. It is suitable as a replacement RF antenna for many access points and radios equipped with SMA connectors, including mobile, PCMCIA card, navigation device, vehicle wireless device, etc. Works for the current digital MOBILE systems.