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modal3000technology, the Littmann Electronic Stethoscope Model 3000 is a powerful, effective tool for health care professionals. Most of all, know that the Model 3000 carries the Littmann brand name,The Ludlum Model 3000 is a durable, lhtweht instrument that is used with an external detector for alpha, beta, and gamma radiation survey. It features a large, easy-to-read LCD screen