Antenna to trigger receiver when a programmed tag enters within a 5 metre range. Completely independent from the receiver, it only needs power to work, making it very easy to install. When a Free Tag gets close enough to the antenna, it triggers the tag which sends a 868MHz radio signal to the corresponding receiver at a distance of up to 100 metres.
 
The hands free system allows the independent control of up to 28 doors or other devices, without the need to ever press a button.