K531 wire-free gate
This head uses radio rather than cable to connect to the timer.
With two channels, two rings can be used side by side.
The head is powered by internal rechargeable batteries which give over 24 hours continuous use between charges.
The range of the radio signal is 200 metres (line of sight).
The maximum distance between head and reflector is 30 metres.
Legal for use in Europe without a site licence.