It includes a medium mask with a coaching whistle that is designed for children (approx. 2-6 years of age). The mask makes a sound at the correct inhalation rate, providing feedback to the carer when the medication is being inhaled. It is embedded with silver ion to protect against 99% of all harmful bacteria. It features optimal 210mL volume, tidal breathing valve and storage of the puffer inside the spacer. It is made from anti-static, BPA free and anti-bacterial plastic. Anti-Bacterial, Anti-Static, BPA & Latex Free, Coaching Whistle, Suitable for infants age 2-6 years guide only. For use with the smartphone Rafi-tone coaching App.