Jim's hyperacute senses allow him to perceive things undetectable by normal humans. He can see perfectly in low light situations and with superb acuity at long distances, hear sounds at extremely low volume or beyond the normal range of human hearing, and sense what others cannot via taste, touch and smell; he declares himself "a walking forensic lab". Jim's powers have a drawback: if he concentrates too strongly on one sense, he may become oblivious to his immediate surroundings. Part of Blair's job is preventing this, and protecting Jim when he is focusing. As a Sentinel Jim has several powers: