Lifetime warranty, we offer return or replace if it has any problem.
1. DC 9V battery operated(battery included)
2. Photoelectric chamber for early detection from all directions
3. Loud>85dB (A) alarm signal
4. Flash alarm indicator (red LED).
5. Test button for easy recommended monthly testing
6. Low battery signal
7. Safety clip feature, not allow mounting of smoke alarm without battery installed
8. Ceiling mounting
9. Easy to install with mounting bracket, battery powered, no wiring needed
10.10 years life time