PHP Warning: Use of undefined constant VBA_SCRIPT - assumed 'VBA_SCRIPT' (this will throw an Error in a future version of PHP) in ..../includes/functions_navigation.php(802) : eval()'d code on line 1 How many milliamps drawn?
Jeff if you know someone with a digital clamp meter that does DC amps you can just clamp it on your sounder positive cable and get a read out.
Power usage may vary when your using back light though.
I just looked up the specs for your sounder and it says 0.383 Amps current draw which is 383mA this would be max draw.
mex