The more you spontaneously and continuously talk with the Speech Jammer, the harder talking becomes. Speech Jammer Features ● Adjustable delay to impair speech ● Tongue twisters to make it even more difficult ● Ability to record Speech Jammer sessions ● Share recordings with your friends ● Simple and easy-to-use layout Speech Jammer works best with noise cancelling headphones and headphones with the microphone built-in.