I have a safe-secondary (integrated octo) which also has a device known as a sub-duck (qwacker) (underwater noisemaker)built in. The device is available as an add on to a standard power inflator or integrated octo but having it integrated is real handy and doesn’t add any substancial weight or mass to the integrated octo. Basically it’s just another button to press. Some people complain that in itself is a bit confusing but with some use it becomes muscle memory for the inflate and deflate and for the once in a while you need the noise maker the button is already in hand and easy enough to find.