Smoke Detector Alarm 10 Year Built-in Battery Wireless Easy Install 85dB Loud for Home Office Kitchen Safety

Good luck with your favorite purchasesExtra-long and durable  10-year life, static current < 15μA (industry average is approximately 25μA), low-voltage threshold precisely to 2.5V ± 0.1V, preventing false alarms Powerful alarm  80dB(A) sound and light alarm (clearly audible within 3 meters), three-state display of the red indicator light (normal/alarm/under-voltage), wider coverage area Strong environmental adaptability  Supports extreme temperature range of -10℃ to 50℃ and high humidity environment with 95% RH, IP44 waterproof design. Installation is user-friendly.  Standardized 60mm installation hole spacing, compatible with most pre-installed hole positions in houses, supporting dual-mode for wall and ceiling installation. (The product does not come with batteries, users need to prepare two No. 5 batteries by themselves)