Team Fortress Voice Amplifier and Speaker Device Cosplay Mask Accessory Cosplay loud and proud! The SmallTalk ST2-P is a voice communication device. The microphone is designed for use with the S.E.A.SMF full face respirator mask (sold separately), but it makes the perfect cosplay accessory! Use it with your Darth Vader or Stormtrooper helmet and communicate clearly with the crowd! Unit consists of a mouth piece (the microphone) that is wired to a external speaker with adjustable volume control. Requires one (1) 9V battery. Avoid exposing the microphone to water. Wipe with clean, damp cloth.