... longer can be request)· Components: PCB,sensor,voice chip,speaker,LED indicator and batteries, more or less for different items· ... and ODM is available,Provide customized function: can be customized LED flash functionA, sound keychain-sound module for promotion gift or ... size,shape,function,packageing) B, Light keychain(LED keychain)we can make any color LED( white,red,green,blue,RGB light , ...