The present invention includes a micro-actuator assembly. The reclosable bag generally includes at least one sheet of web material having at least two areas of structural weakness. A bias adaptation part detects a change in at least one an operation and an environment of the amplifying part, attenuates the RF signal according to the detected change, detecting the envelope of the attenuated signal, and generates a supply voltage control signal according to the envelope. A system which assists in detecting alteration of value documents or transmissions, such as a coin counter voucher is provided.