Combination smoke + CO alarm
Kidde 10-Year Battery Smoke and Carbon Monoxide Alarm (30CUD10-V)
One sealed-battery unit that detects smoke and carbon monoxide and says which one it found, for the spots where one device has to do both jobs.
We earn a commission if you buy through links on this page, at no extra cost to you. It does not change what we recommend. See our affiliate disclosure. As an Amazon Associate I earn from qualifying purchases.
Best for
Hallways outside bedrooms, where a smoke alarm and a CO alarm are both needed
Specifications
| Sensors | Photoelectric smoke + electrochemical CO |
|---|---|
| Power | Sealed 10-year battery (not replaceable) |
| Alerts | 85 dB horn with voice alerts that name the hazard |
| Standards | Certified to UL 217 (10th ed.) and UL 2034 (5th ed.), Intertek/ETL |
| Warranty | 10-year limited |
Specifications as published by Kidde. Confirm against the current spec sheet before buying: manufacturers revise models without renaming them.
What's good
- Works through an outage: no mains power needed
- Voice alerts tell smoke from CO, which changes what you do next
- One device where two would otherwise be needed
What's not
- Photoelectric smoke sensing only: Kidde itself recommends having both sensor types in the home
- No CO ppm display, unlike the COBD10
- Kidde recommends testing it weekly
Our verdict
Put it where both alarms are required anyway, the hallway outside the bedrooms is the classic spot, and it covers both hazards through an outage without a wire. For the level a generator's exhaust would reach first, like rooms next to the garage or a basement, the COBD10's ppm readout is the better instrument.
Compare with the alternatives
- Kidde COBD10 Carbon Monoxide Alarm: every level of the home and outside sleeping areas, before generator season
- Southwire 12/3 SJTW 50 ft Outdoor Extension Cord (2588SW0002): running a fridge, freezer or space heater from a portable generator at a safe distance
- Reliance Controls Pro/Tran 10-Circuit Transfer Switch Kit (31410CRK / 310CRK): portable generators up to 7,500 running watts with an l14-30 outlet
- Reliance Controls PB30 Power Inlet Box (30 A, L14-30): interlock-kit and transfer-switch installs fed by a portable generator's l14-30 outlet
- WEN PC3025 30-Amp Generator Power Cord, 25 ft (L14-30P to L14-30R): connecting an l14-30 generator to a house inlet from 20 feet or more away
- STA-BIL Storage Fuel Stabilizer, 16 oz (22207): gasoline generators and stored fuel cans that sit for months between outages
- Southwire Surge Guard Generator Neutral-Ground Bonding Plug (44400): a floating-neutral generator run on cords, when an rv surge protector reports open ground or an ev charger refuses to start