eufy Indoor Siren E20 (3 Pack) White

Loud 110 dB Alarm for Whole-Floor Coverage: Powerful enough to alert the entire floor, ensuring a timely response. Reliable Power with Backup Battery: The rechargeable battery provides 48 hours of backup during power outages and automatically recharges when power is restored. Flexible Installation Options: Place on a desk, attach to a wall using the included 3M adhesive strip, or mount with screws. Expansive Wireless Range with HomeBase™: Provides a stable connection with HomeBase™ at open-air distances of up to 656 ft (200 m). Requires a US version of HomeBase™ to Operate