within the insert 20 the insert 20 has exterior dimensions that allow it to be inserted through the open end of the arrow shaft 10 into the hollow interior of the arrow shaft 10 insertion of the insert 20 continues until the upper end of the socket 22 is generally even with the open end of the arrow shaft 10 the insert 20 can be designed with substantially the same diameter as a conventional insert to result in a snug friction fit against the interior of the arrow shaft 10 this configuration allows the present invention to be directly substituted in place of a conventional insert without modifications to existing arrows the insert 20 can be permanently bonded to the arrow shaft with adhesive or other equivalent means either metallic or non conductive materials can be used to fabricate the insert if a conductive material is used the body of the insert provides a degree of electromagnetic shielding for the radio transmitter 30 and can form part of the power circuit between the radio transmitter 30 and the batteries 32 however a non conductive insert simplifies assembly of the device and eliminates the risk that the insert might accidentally short the radio transmitter 30 or its antenna 35 in the embodiment shown in fig1 and 2 the socket 22 and threads 25 serve as a connector to secure the arrow head 15 to the insert 20 this is largely.