This 5-pack of X-Sense SC06 smoke and carbon monoxide alarms is $30 off at Amazon, which works out to about $32 per alarm. Each unit has a sealed 10-year battery, so there are no battery swaps. These are standalone alarms and do not link wirelessly to each other. Shipping is free. Buy Now at Amazon
Features
10-year battery life Combined smoke and carbon monoxide detection Easy wall or ceiling mounting No wiring required Model: SC06
