Profile: Schell Electronics, Inc. is a manufacturer of motion detecting, light detecting, and signaling transmitters. We supply law enforcement with RF transmitters for counter drug activities including motion detecting and light detecting signaling transmitters for electronic surveillance, package beepers or beacons that provide loss prevention of drug evidence, trip wire activated tracking transmitters for drug parcels and motion sensing transmitters for vehicle tracking. The Schell Covert 3 signaling transmitter is designed for power. It can be used in situations that allow a larger device to be hidden. The Covert 3 has 16 selectable identities. This (DTMF) transmitter is capable of going the distance in a covert operation. It can be attached to an external battery for extended signal life and distances. Its signals are compatible with any commercially available FM receiver.