A capsule range of external sounders, in three colours, with options for radio, wired and decoy. Designed for use with i-on and Menvier, new and legacy 868MHz systems. Wired variants also compatible with third-party control units. Engineer-friendly: a self-supporting lid, built-in spirit-level and revolving fixing holes for ease of installation including on uneven surfaces. High-power comfort LEDs and LED strobes: provides reassurance for the user. Common enclosure for entire range: impact-resistant polycarbonate construction in a choice of 3 colours: blue, amber and red.