Object monitoring device

The invention relates to a device for monitoring objects, each object being assigned a transmission unit (1) and the transmission signals generated by each transmission unit (1) being detected by at least one signal reception unit (2). According to the invention, the transmission unit (1) is assigned an energy store (3) as an operating voltage source, wherein means (4, 5) are provided for the wireless transmission of electrical energy to this energy store (3). Furthermore, after the charging phase of the energy store (3), the transmitting unit (1) starts emitting signals while discharging the energy store (3), with the signal receiving unit (2) connected downstream of an evaluation circuit (6, 16) for evaluating the transmitted signals received by the same is. Finally, the transmission unit (1) sets the transmission of transmission signals after a certain discharge time. This device according to the invention is cheap and easy to manufacture and advantageously for monitoring, in particular for searching objects used.