
See today's price on Amazon
Amazon prices change often — we always send you to the live price, so you never act on a stale number.
Comparing 3 retailers for the best deal
Prices range $59.99–$79.99 — save up to $20.00 by choosing the right store.
Product prices and availability are accurate as of Aug 22, 2026, 2:35 AM and are subject to change. Any price and availability information displayed on the retailer's site at the time of purchase will apply.
The lowest in-stock price right now is $59.99 at Best Buy. We compare 3 retailers every day so you always see the cheapest current price.
SimpliSafe 105dB Auxiliary Siren is currently available at Best Buy, Amazon, and eBay. Use the Price Comparison table above to jump straight to the cheapest listing.

Anlapus
Anlapus 4K 8MP Add-on Home Security Camera Outdoor Indoor, 1 x Surveillance Bullet Camera and 1 x Pan Tilt CCTV Cam, Audio Recording, 80ft IR Night Vision, 90° Wide Angle, Works with Our DVR Only
from 1 retailers

EGIZPY
EGIZPY Fridge Door Alarm with Delay, Door Alarms When Opened, 8PK
from 1 retailers

eufy Security
eufy Security Smoke Alarm E10, Smoke Detector, Ultra-Compact 70 mm Design
from 2 retailers

Carltec
4MP 2K Window Mount Security Camera, Dual-Band 2.4GHz 5GHz WiFi Indoor Wireless Camera, Starlight Color Night Vision, AI Motion Detection, 24/7 Recording, Quick Magnetic Installation for Glass Window
from 1 retailers
See today's price on Amazon
We link you to Amazon's live price — never a stale one.
See price at AmazonComparing 3 retailers for the best deal
Product prices and availability are accurate as of Aug 22, 2026, 2:35 AM and are subject to change. Any price and availability information displayed on the retailer's site at the time of purchase will apply.
We refresh prices regularly, but retailers move fast. If you found this item cheaper somewhere we compare, let us know and we'll take a look.