SECO-LARM E-37RV Spare Vibrating Receiver For the E-37EV Pager System, Built-in Vibrating Function for Silent Paging, LEDs Indicate Which Zone or Manual Page of Which Premises or Vehicle Was Triggered For the E-37EV Pager System Built-in vibrating function for silent paging LEDs indicate which zone or manual page of which premises or vehicle was triggered LEDs indicate which zone or manual page of which premises or vehicle was triggered