The MicroDetector(tm) from UltraVision is an innovative portable motion detection system designed to increase the personal safety of police officers, military personnel, and others involved in tactical field situations. Weighing only 8 oz., MicroDetector is a small, battery operated sensor that creates a spherical detection field of up to 25 feet. The Sensor may be placed or thrown to a desired location and motion may be detected even through light walls or when MicroDetector is buried under a few inches of soil. Detected motion is reported wirelessly to a receiver which can be interfaced to a hand held PDA, laptop or police radio. The receiver can monitor an unlimited number of MicroDetectors and the receiver monitors the status of every Sensor during operational exercises. Each Sensor is encased in a durable, water resistant housing with four Sensors to a case that also doubles as the battery charger. Battery life is 24 hours continuous, 48 hours using Power-Save Mode.