ST2 SmallTalk


In-mask communication

Make yourself heard with your mask on

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 respirator in seconds, and removed without a trace. That means there are no changes to maintenance or cleaning, either.


  • Communicate freely without removing your respirator
  • Clear voice communication through a light-weight, unobstructive loudspeaker
  • Long-lasting standard 9V battery. Widely available, easy to change
  • Pocket-sized amplifier/loudspeaker
  • Rugged construction, designed to withstand temperature, vibration, impact, dust and spray
  • Thin, flexible cable — can be worn inside clothing
  • The microphone is mounted in the protective cap at the speech diaphragm of the respirator, which means that it can be attached and removed without any permanent modification or intrusive alteration of the respirator
  • The loudspeaker unit can be clipped onto a breast pocket, waist belt or shoulder strap

Data Sheet

Electronic communication device
  • Description: In-mask microphone with exterior amplifier and loudspeaker. Fits Sundström half and full face masks without permanent modifications
  • Battery: Standard 9V alkaline or rechargeable battery
  • Microphone: ELECTRET type, mounted in snap-on valve cover
  • Loudspeaker: 50 mm Mylar cone, 8 Ohm, 2 W
  • Dimensions (speaker unit): 64 x 96 x 35 mm
  • Weight: 146 g (without battery)


Instruction Manual