... sounds or lights or sound with light ,or flashing . A, sound keychain-sound module for promotion gift or ... daily life ,etc.), and send me your own design.b, I will make the DEMO board(sound sample ... to yours, and send you drawing depends on your design.c, If you approved DEMO sound and drawing , ... , printing your logo if you need . B, Light keychain(LED keychain) we can make any color LED( white,red, ...