with over 20yrs experience in electromechanical product design and development, live in Shenzhen, China, the biggest electronics manufacturing base in the world, we can use countless resources to built what you want, i would like to take this job, but i don't have clear what the staff is exact about between headset with mobile phone, wireless communication? remote control? or any other things, but it must have a PCBA and a case. could you explain it more, i can bid it more accurately, how much do you need?