As well as the new tri-colour addressable overdoor lights and sounders, slave tri-colour overdoor lights are also available for direct connection to Quantec-Pro Call Points or Cardiac Points. These are typically located outside individual rooms to indicate that the device inside the room has triggered. Features Provides visual indication of calls made from a Quantec cardiac call point. Flash rates change/intensify to reflect the urgency of the incoming call. Dual red and green LEDs and triangular diffuser make it highly visible from a distance. Mounts on a standard UK 25mm single gang flush or surface back box. Finished in tough, durable ABS plastic.