The Inspector Alert measures alpha, beta, gamma and x-radiation using a 2-inch "pancake" GM detector with high sensitivity to common beta and alpha sources. A highly accurate and easy-to-read digital display shows readings in your choice of mR/hr, CPM, CPS, or µS/hr. Each pulse also registers visually (by LED) and audibly (which can be muted). A Total/Timer feature allows timed readings from one minute to 24 hours for precise measurement of low level contamination. An audible alert sounds when the radiation reaches a user-adjustable level.