The stylish range of Friedland Libra+ wireless Door Bell Chime Systems offer a host of new features, making them compatible with home security products such as the Spectra PIR Movement Detector. Libra+ Systems operate on the new 868MHz frequency with a range of up to 200 metres from Bell Push to Door Chime. The Door Chime visual identification icons enable you to identify the source of chime or alert tone activation, ideal for noisy environments or for the hard of hearing. Libra+ Door Chime systems can easily be extended to Security System by adding a Spectra PIR Detector. Accessories include additional Door Chimes, Bell Pushes and a Telephone Transmitter. Complete with full 2 year Warranty.