The CentiumDFX wireless alarm system from 30Plus uses the very latest Rolling Code PRNG technology, which provides a unique code in transmission between the alarms and receiver to ensure they stay in contact solely with each other and no-one else's receiver. They also incorporate a host of other innovative features, making them durable, practice and sensitive to the smallest of movement on your line, such as fine-tunable (five settings) tone, volume and sensitivity. The volume can even be switched to vibration-only, while the sensitivity can be set between 2mm and 80mm. Further features include stainless machine-turned snag bars, anti-slip soft touch rod channel, simple on/off switch for silence mode during setup, clip-in betalight facility, low-battery warning and a classy matt anti-glare finish. You can also customise your alarms with the interchangeable light latches (choose from five colours all supplied in the pack)and interchangeable fascia designs (including silver, camou and Union Jack flag, available separately). Teamed up with the CentiumDFX receiver, the set offers a wireless range in excess of 100m and has received fantastic reviews from both press and anglers alike. Requires a 9v battery for long-lasting use.