Please Note: The XP0H-SN is a basic standalone unit; does not support wireless interconnection, does not have Wi-Fi, and cannot be used with a base station; for an interconnected version, search for XP0H-WN

2-in-1 Protection, One Simple Solution: This combination alarm features built-in sensors for both smoke and carbon monoxide, delivering reliable 24/7 protection—all in one compact device

10-Year Sealed Lithium Battery: The long-life battery and reliable performance offer peace of mind without the hassle of battery changes, knowing your home is protected for a decade

Large Mounting Bracket for a Clean Finish: Our extra-large 5.7-inch (145 mm) bracket covers more area than standard small ones, easily hiding old screw holes and ceiling stains from previous alarms; installation looks neat with no need for patching (Note: Please check that your existing device fits within this size before installation.)

Built-in Self-Test: Automatically checks the sensors, electronics, and battery every 60 seconds to ensure the device is working properly and keeping your home and family safe

Easy-to-Read LCD: See real-time CO levels and battery life at a glance; the LCD screen stays off during standby and only lights up when there’s an alarm or test—so it keeps you informed without disturbing your sleep