This recall involves Kidde TruSense Smoke Alarms and Combination Smoke/Carbon Monoxide Alarms.  The recalled units are Kidde Model Series 2040, 2050, 2060 and 2070 Smoke and Combination Smoke/Carbon Monoxide alarms.  Only alarms with the TruSense logo or “AMBER=FAULT” printed on the front of the alarm are included in this recall.  The model number is printed on the back of the alarm.

More information can be found here.