SmallTalk for Sundström masks ST2-SR (Each)Electronic communication device In mask communication Make yourself heard with your mask on In mask microphone with exterior amplifier and loudspeaker. Fits Sundstrm half and full face masks without permanent modifications If you can talk with your respirator fitted, there is no need to remove it. SmallTalk is designed to make 100% wear time possible. No holes, no permanent attachments, no damage to your mask. SmallTalk can be fitted to your