Tests and activates transponders at short range (~1'-3'). The handheld activator is intended for activated transponders only. The transponders power-on when they hear the appropriate activation signal generated by an activator device. Once the transponder turns on it will stay on for 1 hour. If it does not hear the activation signal again within the hour it will turn off automatically. If the transponder does hear the activation signal again, it will reset its internal timer and remain on.