Two more police dogs are to be fitted with cameras after a local businessman donated £6,000 to the Lancashire force.
Dogs fitted with the cameras help during gun sieges
The dogs are trained to help during armed sieges and wear miniature television cameras with transmitters fitted to their heads or harnesses.
These can alert officers to suspects hiding in a building, its layout and whether or not anyone is armed.
The Firearms Intervention and Dangerous Operations (Fido) cameras were funded by Preston businessman Ilyas Ahmed.
The technology worn by the dogs wirelessly transmits audio and video back to a hand-held monitor for officers to view.
It can also be used to search buildings in the dark, with infra-red imaging.
Sgt Phil Kenyon, of Lancashire Constabulary's Police Dog Training Unit, said: "We have used earlier versions of the Fido system for some years with notable success but the technology behind it is progressing at a tremendous pace.
"Mr Ahmed's involvement in the project means that we can equip our dogs and their handlers with state of the art cameras to make the hazardous work of our Specialist Firearms Teams that bit easier.
"There is no doubt in my mind that Mr Ahmed's kind gesture will go some way towards making life for the people of our communities even safer".