number of requierd jumps

[iranianjumper 2]

Not sure it is a right place to ask ,

please , is there any minimum  jump number required to use :

- digital altimeter

- full face helmet 

and audible altimeter ?

[Binary93 65]

https://uspa.org/SIM/5: "Students should use audible altimeters only after demonstrating a satisfactory level of altitude awareness."

Not sure if you're asking about USPA, so please clarify that.