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Expand your Ring Alarm system to secure each door and window in your home, and hear chirps as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you'll always be the first to know when something's ajar.

VEVOR Commercial Ice Cream Maker, 22-30L/H Yield, 2200W Countertop Soft Serve Machine w/ 2x6L Hopper 2L Cylinder LCD Panel Puffing Shortage Alarm, Frozen Yogurt Maker for Restaurant Snack Bar, Silver3 Flavors & 3 Distinct NozzlesHopper onto Another LevelBuilt-in Puffing TubesOne-click CleaningThoughtful DetailsPerfect for Various PlacesHopper Capacity: 1.6 Gal / 6 L,Refrigerant: R410a,Model: BJH288SR1B-Z,Product Weight: 187.4 lbs / 85 kg,Cylinder Capacity: 0.5 Gal / 2 L,Compressor: 1050W,Ice Cream Output: 5.8-7.9 Gal / 22-30 L per Hour,Voltage & Power: 110V / 60Hz; 2200W,Product Dimensions: 29.3" x 21.3" x 34" / 74.5 x 54 x 86 cm

This text is aimed at technicians, hobbyists, and students and provides complete circuit diagrams and building instructions for a wide range of creative sleuthing applications. The designs are fully tested and proven effective in real-world alarm, sensor, and security equipment. Among the circuits highlighted are a multi-purpose high-gain amplifier, temperature and pressure sensors, vibration and pyroelectric sensors, smoke and toxic gas detectors, tachometer/speed gauges, a remote video and control system, door and window alarms, motion and impact detectors and tone signalling sensors. Computer interfacing is also covered, with circuits for joystick, trackball, mouse, RS-232 and analog-to-digital interfaces.

A hand-inspected Used copy of "Fire Alarm Systems (26405-17)" by National Center for Construction Education and Research. Ships directly from Textbooks.com

Ring Alarm Motion Detector expands your Ring Alarm and adds an extra layer of security to your home. When your Ring Alarm system is armed, the Motion Detector sends instant alerts to your phone and tablet whenever motion is detected at home. The Motion Detector is a simple addition to your Ring Alarm that installs in minutes. Simply place your Motion Detector in a corner of any room in your home, connect it to your Ring Alarm Base Station, and you're all set up!.

Ring Alarm Motion Detector expands your *Ring Alarm* and adds an extra layer of security to your home. When your Ring Alarm system is armed, the Motion Detector sends instant alerts to your phone and tablet whenever motion is detected at home.***Ring Protect subscription required, sold separately. The Motion Detector is a simple addition to your *Ring Alarm* that installs in minutes. Simply place your Motion Detector in a corner of any room in your home, connect it to your Ring Alarm ** Base Station, and you're all set up!.

Stay ahead of water damage and protect your home from severe and costly repairs. Simply connect the Alarm Flood and Freeze Sensor to your Ring Alarm Security Kit (sold separately) and you'll get notifications when water is detected or when the temperature drops below 40°F. Then place the Sensor on the floor near sinks, bathtubs, showers, refrigerators, freezers, washing machines, dishwashers, water heaters, water coolers, toilets, basements and any other sources of potential leaks. Material: Plastic.

The battery Google Nest Protect smoke and CO alarm looks for fast-burning fires, smoldering fires, and carbon monoxide. It tells you where the danger is and alerts your phone in case you're not home.1.

The battery Google Nest Protect smoke and CO alarm looks for fast-burning fires, smoldering fires, and carbon monoxide. It tells you where the danger is. And alerts your phone in case you're not home.1.

Tired of fumbling for your phone in the middle of the night to see the time and temperature. Why not simply turn and look at the ceiling or wall? With La Crosse Technology's Atomic Projection Alarm Clock with Indoor and Outdoor Temperature, the information you need is projected onto your ceiling or wall for easy viewing. With adjustable projection angle and focus you'll be sure to cast the information you want to a perfect viewable surface. Displays your choice of time, indoor temperature, outdoor temperature or alternating time and temperature. There's no need to adjust for Daylight Saving time. La Crosse Technology's Projection Alarm Clock adjusts automatically if desired. Choose a 12 or 24 hour time display, as well as calendar year, month, and date. With four backlight level options and auto dim, you'll have just the right viewability for night or day. Both display and the included wireless outdoor sensor have low battery indicators for uninterrupted service. With all these features in a handsome silver case, La Crosse Technology brings function and form to your bedside.

This dynamic dual alarm clock showcases vibrant white digits that pierce through a curved mirrored display. Its sleek design comes complete with a USB charging port, indoor temperature and humidity readings, custom alarm options, programmable auto-dim settings, and more. Easy to use and marvelous to look at, the Curved Mirror LED Alarm Clock with Indoor Temp and Humidity will make an excellent addition to your bedside, living room, kitchen, office, or any modern space. Order yours today!.

The Schlage Century Matte Black Connect Smart Lock with Alarm combines advanced features and compatibility with your home automation system, allowing you to control your home from anywhere and freeing you from the hassles of keys. With the chic, delicate curve of the Century trim, the lock pairs well with interior Schlage hardware. The striking appearance of the Matte Black finish creates an elegant look that's sure to be noticed in any style setting. Plus, it's been designed and tested with strength and durability in mind.

At the core of Braun lies design purity. Originating from Bauhaus, 'less, but better' defines our ethos, brought to life by Braun and Dieter Rams. for 6-decades, our humanistic design has spurred global inspiration. in 1971. Dietrich Lubs, a Rams protege, propelled Braun into clocks, shaping enduring designs. Introducing the Braun classic travel analogue alarm clock, a compact marvel with an easy-to-read dial and iconic yellow second hand. Originating from the famed AB 1. designed by Dietrich Lubs in the late 80s, it now features improved movement, luminous hands and a snooze/light function. Compact (5.7 cm W x 5.7 cm H x 2.7 cm D) and light-weight, it's the ideal travel companion. Its clean dial and luminous hands ensure legibility, driven by quiet quartz movement. Backed by a 2-year guarantee, battery not included. Includes clock and manual. Color: White.

400W 8 Sound Loud Car Warning Alarm Police Fire Horn PA Speaker MIC SystemLoud and Clear8 Warning TonesControl and MicInterface for LightsEasy to InstallWide ApplicationGross Weight: 16 lb (7.26 kg),Output Power: 400W,Shell Main Material: Plastic,Sound: 8,Package Dimensions(LxWxH): 12.6"x7.9"x6.7" (32x20x17 cm),Sound Level: 135dB,Rated Voltage: 12V DC

Aqara Door and Window Sensor P2 not only incorporates all the advanced automation and security features Aqara is known for. But also gives users the option to connect it directly to third party Thread border routers, such as smart speakers, and use all the benefits of the Matter smart home standard. Support Local Automation.

Help secure outdoor gates, sheds, guesthouses, and windows with Ring Alarm Outdoor Contact Sensor. Get mobile alerts when your outdoor gate opens, or set the sensor to automatically trigger your Ring Alarm siren when armed in Home or Away mode. Outdoor Contact Sensor comes with mounting tape and screws for easy installation on most surfaces.*Requires Ring Alarm or Ring Alarm Pro, both sold separately.*.

The Kidde P3010CU is a 10-year, sealed battery, smoke and carbon monoxide alarm with a voice warning system that features photoelectric and electrochemical sensing technology with Smart Hush feature. This combination alarm combines the detection capabilities of a photoelectric sensor with that of an electrochemical sensor, which is used to detect CO. When either sensor notices a potential hazard, it will communicate with the other. Depending on what is detected, the alarm will adjust its smoke sensitivity in order to better discriminate between a real hazard and a false one. This constant communication enhances the alarm's overall performance and significantly reduces the potential for a nuisance alarm.The voice warning system announces "Fire", or "Warning, Carbon Monoxide" to help eliminate any confusion and clearly warn you and your family of a smoke or carbon monoxide danger. The sealed in lithium battery will power the unit for the entirety of its 10 year life, eliminating the need for battery replacement and worry about unauthorized battery removal. The alarm provides continuous protection from smoke and carbon monoxide, even during power outages. The alarm will automatically activate when it is attached to the mounting bracket; there are no pull-tabs, no switches, everything is automatic. At the end of alarm life, the unit will chirp, indicating the alarm is in need of replacement.

VEVOR Commercial Ice Cream Maker, 22-30L/H Yield, 2350W Countertop Soft Serve Machine w/ 2x6L Hopper 2L Cylinder LCD Panel Puffing Shortage Alarm, Frozen Yogurt Maker for Restaurant Snack Bar, Silver3 Flavors & 3 Distinct NozzlesHopper onto Another LevelBuilt-in Puffing TubesOne-click CleaningThoughtful DetailsPerfect for Various PlacesHopper Capacity: 1.6 Gal / 6 L,Refrigerant: R410a & R134a,Model: BJH288SR2JB-Y,Product Weight: 202.8 lbs / 92 kg,Cylinder Capacity: 0.5 Gal / 2 L,Compressor: 1050W,Ice Cream Output: 5.8-7.9 Gal / 22-30 L per Hour,Voltage & Power: 110V / 60Hz; 2350W,Product Dimensions: 29.3" x 21.3" x 34" / 74.5 x 54 x 86 cm

Braun epitomizes design excellence. Originating from Bauhaus, our 'less, but better' ethos, championed by Dieter Rams, brings clarity to appliances. Since 1971. guided by Dietrich Lubs, we've crafted iconic clocks. Introducing the Braun classic travel analogue alarm clock-easy-to-read dial, iconic yellow second hand. Compact (W5.7cm x H5.7cm x D2.7cm), lightweight, perfect for travel. Originating from AB 1. it boasts improved movement, luminous hands and a snooze/light function. Clean dial, luminous hands offer excellent legibility. Backed by a 2-year guarantee, battery not included. Includes clock and manual. Color: Black.

Bedside alarm with loaded features including bright multi-color LED with large time digits and brightness control. View current room temperature (F/C) and humidity and their trends. Featured icons include Moon phase, WWVB connection and low/weak battery indicator. AC adapter included for USB charging port to refill battery power in Smartphone or other mobile device. Color: Black.