Resembling a hockey puck, MicroDetector aids tactical missions of police officers, SWAT teams or military personnel. An individual or robotic device can place detector in an area to determine presence of an individual. Works through microwave technology. Wireless transmitter sends results back to a laptop computer or PDA, located off the premises. Ideal for adding safety during a police stakeout, hostage situation or for guarding perimeters of military bases. Offers omni-directional motion detection within 20-ft. range. Measures 4 ins. in diameter and weighs 8 ozs. Comes in case that serves as battery charger. UltraVision Security Systems Inc., Salem, N.H.