Describe the mechanical Hound?

The terrible triumph of modern technology, the Mechanical Hound is programmed to track down and destroy any victim to whom its infallible sensors are set, and can distinguish over 10,000 different scents. After Montag murders Beatty, the Hound stabs and injects Montag's leg with procaine. However, Montag is able to successfully destroy the Hound with the flamethrower. Authorities send in a second Hound to hunt him down, but Montag is able to throw it off his scent and escape. Unfortunately, the Hound kills an innocent man whom the media claims in Montag, thus keeping the faith and fear of the people.