What If You Built a Home on Mars?: Think Like An Engineer

The Siren

Blue Police Beacon Light Toy,Spinning Effects&Realistic Siren Sounds, Perfect for Pretend Police Play, for Kids Age 3+

Nippon America High Decibel High Power Outdoor Alarm Security Siren (TC-S7545-110), Long Range, 80 Watts, 120 Decibels, Remotely Activate with Wi-Fi Socket (Sold Separately)

Emergency Police Siren 200W Multi-Tones PA System Slim Speaker Sirens with Handheld Controller & Mic Microphone Warning Electronic Alarm Horn Kit for Tow Truck Car Vehicles Pickup UTV ATV POV RV

MyMealivos 20W Megaphone Bullhorn, Built in Siren & 240s Recording, 5.4"×8.6" Portable Megaphone with Volume Control Cover Up to 300 feet+ for Indoor and Outdoor Activities(Teal)

Alarm Horn Siren PA Speaker Mic System,BANHAO 100w 12v 7 Sound Loud Car Alarm Police Car Siren Speaker System Emergency Amplifier Alarm Kit Horn for 12V Truck Lorry Boat

BooYu 12V 200W 9 Tones Police Warning Emergency Siren PA System [Slim Speaker][125-135dB][Handheld Microphone][Hands-Free][2 x 10A Switches] for Firefighter Ambulance Vehicles Truck Car SUV ATV UTV

Vixen Horns Loud Electric Motor Driven Metal Alarm/Siren (Air Raid) 12V Gray VXS4006