... -made ,press a button ,it sounds or lights or sound with light ,or flashing . A, sound keychain-sound module for promotion gift ... you wanted.e, printing your logo if you need . B, Light keychain(LED keychain) we can make any color LED( white ... : when you press a button ,it will sound or light or sound with light. D, Packageing :one pc into a polybag. Or backer ...