Buy ‘alarm’ with Bitcoin Crypto-Currency – Spendabit

Chirp! the Plant Watering Alarm

$21.44 at The Pi Hut

Luminox A.1944 Atacama Field Chronograph Alarm - 1944

$840 at Real Watches

3x Google Nest Protect Wired Smoke and Carbon Monoxide Alarm (White, 2nd Generation)

$458 at Overstock.com

Somfy - Protect Home Alarm

$403 at RoboSavvy

2x Google Nest Protect Wired Smoke and Carbon Monoxide Alarm (White, 2nd Generation)

$312 at Overstock.com

Kidde 9000102A Fire Combo Smoke/Carbon Monoxide Alarm

$43.99 at Newegg

First Alert Combination Smoke and Carbon Monoxide Alarm with Battery

$54.19 at Overstock.com

Digital Desktop Multimeter / Bluetooth Speaker / Clock Alarm

$99.95 at Adafruit

First Alert Battery Photoelectric Smoke Alarm

$77.49 at Overstock.com

BRK First Alert - SC9120LBL Hardwired Smoke & Carbon Monoxide Alarm

$64.99 at Overstock.com

Somfy - Protect Smoke Alarm

$64.33 at RoboSavvy

Seiko 7" Traditional Dual Bell Alarm with Snooze, Dial & Light

$48.95 at Overstock.com

Kidde 21010167 10 Year Hallway Smoke Alarm

$51.99 at Overstock.com

Kidde, Battery-Smoke/Carbon Monoxide Alarm with Voice Warning

$45.49 at Overstock.com

La Crosse Technology Wireless Charging Alarm with Outdoor Sensor

$53.49 at Overstock.com

5pcs AC220V Pilot Light Indicator Flashing Alarm with Buzzer, Red LED

$14.49 at Overstock.com

First Alert SC9120B-12ST Combo Smoke & Carbon Monoxide Alarm

$64.90 at Overstock.com

First Alert 10-Year Sealed Battery Photoelectric Slim Round Smoke Alarm - 1 Each

$35.62 at Overstock.com

Kidde P3010K-CO Kitchen Photoelectric Smoke and Carbon Monoxide Alarm

$56.99 at Overstock.com

First Alert 10-Year Sealed Battery Photoelectric Slim Round Smoke Alarm - 1 Each

$35.62 at Overstock.com

First Alert 10-Year Sealed Battery Photoelectric Smoke Alarm with Emergency Light - 1 Each

$46.22 at Overstock.com

Pilot Light AC 220V Panel Indicator Flashing Alarm with Buzzer, 2Pcs - Red

$12.99 at Overstock.com

First Alert Hardwired 120V Ionization Smoke Alarm - 1 Each

$39.22 at Overstock.com

Technaxx Universal Car Alarm Pro TX-168

$61.99 at Newegg

First Alert BRK FG250B Dual Ionization Smoke Alarm with 9-Volt Battery

$13.99 at Overstock.com

2pcs Red Light with Buzzer AC/DC 24V 22mm Panel Mount Flashing Alarm

$12.49 at Overstock.com

Star Micronics 39594002 Bu01-24-A, Ticket Alarm, Replaces 39594001 Once Depleted

$32.99 at Newegg

3Pcs Driving Doze Reminder Anti Sleep Alarm 80dB with Vibration Alert - Black

$19.99 at Overstock.com

Driving Doze Reminder Anti Sleep Alarm 80dB J Shaped with Vibration Alert Black

$11.99 at Overstock.com

White Anti Thief Magnetic Office Home Security Alarm

$9.49 at Overstock.com

Large Piezo Alarm - 3kHz

$4.27 at RoboSavvy

First Alert Plug-In 120V Electrochemical Carbon Monoxide Alarm - 1 Each

$39.77 at Overstock.com

Pilot Light AC 220V Panel Indicator Flashing Alarm with Buzzer, 2Pcs - Red

$12.99 at Overstock.com

Kidde - i12040 Hardwired Interconnect Smoke Alarm with Hush

$18.24 at Overstock.com

2pcs Pilot Light Panel Indicator Flashing Alarm with Buzzer, Red LED

$11.99 at Overstock.com

SparkFun H2OhNo! ATtiny Dev Board / Water Alarm

$9.26 at RoboSavvy

Alarm Clock Kit with ZIP Halo HD for micro:bit

$43.92 at The Pi Hut

Digital Security Safe Box with Alarm with Inner Cabinet LED Light

$568 at Overstock.com

Simalai TW-03 Temperature Alarm Water Level Controller

$123 at Aquarium Low Cost

Simalai TW-02 Temperature Alarm Water Level Controller

$89.00 at Aquarium Low Cost

8015002 Module Low Coolant Alarm

$196 at Ozautoelectrics

Brigade SA400 Self Adjusting Medium Duty Reverse Alarm

$123 at Ozautoelectrics

Vibration / Shock Sensor Home Security Anti Theft Alarm (1 x 6F22) (Alarms & Security Category)

$35.95 at Gadgets Direct

Divoom Ditoo Plus Retro Pixel Art Game Bluetooth Speaker, Smart Alarm,

$97.53 at Scan Computers

60dB Personal Security Alarm with White Light Torch (3 x LR44) (Alarms & Security Category)

$13.95 at Gadgets Direct

La Crosse Technology Wireless Charging Alarm with Outdoor Sensor

$58.99 at Overstock.com

BS260 Personal Minder Anti-Rob Alarm with Keychain -- Black Plus White (Alarms & Security Category)

$19.95 at Gadgets Direct

80dB Seek Help Panic Alarm Keychain (1 x 23A Included / Colour Assorted) (Alarms & Security Category)

$12.95 at Gadgets Direct

Wire Loop Anti Theft Alarm (120dB) (Alarms & Security Category)

$14.95 at Gadgets Direct

BRK First Alert - Hardwire Carbon Monoxide Alarm with Battery

$56.24 at Overstock.com

10yr Smco Voic Loc Alarm - 1 Each

$64.06 at Overstock.com

First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm - 1 Each

$55.19 at Overstock.com

La Crosse Technology Curved LED Projection Alarm with Radio

$38.49 at Overstock.com

First Alert 10-Year Sealed Battery Photoelectric/Ionization Smoke Alarm - 1 Each

$62.95 at Overstock.com

First Alert Plug-In 120V Electrochemical Easy to Read Digital Display Carbon Monoxide Alarm - 1 Each

$55.95 at Overstock.com

Kidde 21010167 10 Year Hallway Smoke Alarm

$56.24 at Overstock.com

Kidde, Battery-Smoke/Carbon Monoxide Alarm with Voice Warning

$43.67 at Overstock.com

Seiko 7" Traditional Dual Bell Alarm with Snooze, Dial & Light

$40.00 at Overstock.com

First Alert 1039809 Hard-Wired Ionization Smoke Alarm, White

$34.15 at Overstock.com

First Alert Battery Operated 9V Electrochemical Carbon Monoxide Alarm - 1 Each

$37.20 at Overstock.com