HEIMAN HM-735ESY

Features

Details from the HEIMAN HM-735ESY Amazon listing:

• UL 2034 5th Edition Certified & CSFM Approved — Meets strict UL 2034 5th Edition sensitivity and performance standards, and is CSFM approved for residential carbon monoxide alarm applications, compliant with NFPA installation codes.This CO alarm provides reliable protection for homes, rental properties and residential spaces. **NOT for use in garages, workshops, or directly under vehicle mufflers/exhaust pipes**. Operating temperature range: 40°F to 100°F (4.4°C to 37.8°C); performance will be compromised outside this range.
• 2 AA Battery Powered — NOT a Plug-In Alarm — This carbon monoxide detector operates exclusively on 2 replaceable AA batteries. It cannot be plugged into a wall outlet or connected to household wiring. No electrical outlet is required for operation. Replace the batteries when the low-battery warning sounds to keep the alarm functioning properly throughout its service life.
• Real-Time LCD Display + Graded Low Level CO Early Warning System — This carbon monoxide detector features a clear digital screen showing live CO readings starting at 20ppm (20–999ppm measuring range), so you can gauge hazard severity at a glance. The co alarm delivers multi-stage alert system: 30ppm early warning for slow low-level buildup, a loud 85dB danger alarm, and 12-hour alarm memory to alert you of missed CO events when you return home.
• Tabletop or Wall-Mount Installation — No wiring or electrician needed for this co detector. Place directly on any flat surface for instant use, or wall-mount with the included full hardware kit. A built-in safety lock prevents forgotten AA battery installation — the cover won’t close without batteries inserted. It auto-powers on after a 100-second warm-up with zero extra setup.
• Ultra-Compact & Portable for Home & Travel — Measuring just 4.09" L × 2.89" H × 1.43" W and weighing only 4.37 oz, this lightweight CO detector is easy to place in bedrooms, hallways, living rooms, family rooms, basements, and other suitable areas throughout the home. Its compact design also makes it convenient to take along to hotels, vacation rentals, RVs, cabins, and more.
• One-Touch Hush & Simple Weekly Self-Test — The single Test/Hush button silences nuisance CO alarms (4 minutes), low-battery chirps (12 hours) and end-of-life alerts (48 hours), while uninterrupted CO monitoring remains active. Use the button for quick weekly self-tests to confirm proper operation.
• All-Source CO Detection for Full Home Coverage — Reliably detects carbon monoxide from every type of fuel-burning source, including gas furnaces, water heaters, fireplaces, car exhaust, clothes dryers and kitchen stoves. Perfect for placement in bedrooms, hallways, living rooms, basements and on every floor of your home.