Since the serial number is a very crucial PIECE to your caller it is SOMEWHAT hidden. We do this to keep it from wearing off or being accidentally removed. For any of the callers that we offer that have a battery compartment within the caller you will find the Serial Number in that compartment. Simply remove your battery door, lift up your battery tray and you will see the number on one of the inside walls. 

Some of the callers we offer do not have a battery door, but a battery bag. For these callers, such as the Hellfire, CS24 series and KRAKATOA models you will have to do a little work. You will need a Phillips head screw driver to start. Remove the 3 or 4 screws that are located at the base of the CAP on the caller and gently remove the cap. Be careful pulling too hard you may disconnect the speaker WIRES. If you do happen to pull them off do not worry. You can just slide the CLIP back over the connectors. Once you remove the cap you will see the serial number on the inside of the speaker cap. 

Since the serial number is a very crucial piece to your caller it is somewhat hidden. We do this to keep it from wearing off or being accidentally removed. For any of the callers that we offer that have a battery compartment within the caller you will find the Serial Number in that compartment. Simply remove your battery door, lift up your battery tray and you will see the number on one of the inside walls. 

Some of the callers we offer do not have a battery door, but a battery bag. For these callers, such as the Hellfire, CS24 series and KRAKATOA models you will have to do a little work. You will need a Phillips head screw driver to start. Remove the 3 or 4 screws that are located at the base of the cap on the caller and gently remove the cap. Be careful pulling too hard you may disconnect the speaker wires. If you do happen to pull them off do not worry. You can just slide the clip back over the connectors. Once you remove the cap you will see the serial number on the inside of the speaker cap.