How can I update if my smoke alarm is the ion or photo electric type? kidde model #KN-cosm-8 combo smoke/CO

kidde model #KN-cosm-8 combo smoke/CO
Any Tips on Insulating my Apartment?
Answers:    You could do an online search using the information you've enter above; or if you open the housing (assuming it's already installed) or look on its posterior (if it's not installed yet), there should be some benign of labeling that will give you this information. It will also be included surrounded by the printed specifications that come with the part (if it's new).