Portable Utility Gadget Prototype Development

I want to bring a compact, consumer-friendly utility gadget to market and need an engineer who can take it from idea to production. The core of the device is simple: when triggered it must emit a clear, audible beep, making it useful as a quick-locate or alert tool... (Budget: $750 - $1500 AUD, Jobs: Bluetooth, Electronics, Embedded Systems, Manufacturing, Mobile App Development, PCB Layout, Product Design, Prototyping)