A fire alarm system warns people when smoke, fire, carbon monoxide or other fire-related emergencies are detected. These alarms may be activated automatically from smoke detectors and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. Fire alarm sounders can be set to certain frequencies and different tones including low, medium, and high, depending on the country and manufacturer of the device. Most fire alarm systems in Europe sound like a siren with alternating frequencies. Fire alarm electronic devices are known as horns in the United States and Canada and can be either continuous or set to different codes. Fire alarm warning devices can also be set to different volume levels.
Beeston is a town in Nottinghamshire, England, 3.4 miles (5.5 km) south-west of Nottingham city centre. To the immediate north-east is the University of Nottingham's main campus, University Park. The pharmaceutical and retail chemist group Boots has its headquarters 0.6 miles (1 km) east of the centre of Beeston, on the border with Broxtowe and the City of Nottingham. To the south lies the River Trent and the village of Attenborough, with its extensive wetlands.