Interactive UK Exhibition Sound System

I am looking for an innovative and skilled engineer who can develop an affordable sound system for an upcoming exhibition in the UK. The specific requirements are: - The sound system should support MP3 format - It should be able to play a single audio file that is 2-3 minutes long - The audio should emanate from a hand-held speaker that would be provided to the visitors at the exhibition. - The audio play should be triggered by a button located on a hand-level surface. Ideal candidates should have proven experience in similar projects and be well-versed in sound systems, especially designing interactive installations for public spaces. Expertise in trigger mechanisms would be a major plus. It is critical that the system is user-friendly and cost-effective. We are excited to hear your creative and practical solutions to make this project a success.