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UPS with automatic voltage regulation?

Home battery backup systems?

UPS vs power bank differences?

How long do backups last?

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Entry-level four-wire TS457/TS607 data recording battery voltage and internal resistance tester for AC use only

$35^.89

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Volume Discounts:$35.59 - $35.89

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4 Pack Room Thermometer Indoor Hygrometer Humidity Gauge Meter | W/ Battery, Accurate Sensor, Monitor Temperature & Humidity, Fast Read, Easy To View, Durable Kickstand, /, Small Size

$31^.99

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Volume Discounts:$28.99 - $31.99

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2 Pcs Plant Water Meter, Soil Moisture Meter for Indoor Outdoor Use | Battery-free, Instant Read Soil Water Level, Easy to Read & Use, Single-Probe, less hurts to plants roots

$26^.99

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Volume Discounts:$23.99 - $26.99

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Outdoor Indoor Wireless Remote Control 3-Prong Outlet Weatherproof Heavy Duty 15 A Compact 1 Remote 1 Outlet with Remote 6-inch Cord 100ft Range ETL Listed (Battery Included)

$31^.99

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Room Thermometer Indoor Hygrometer Digital Humidity Meter | Accurate Sensor, Fast Refresh, Big Digits, Easy to View, /, w/ AAA Battery, Compact for Home, Office, Pet, Plant

$19^.99

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Volume Discounts:$16.99 - $19.99

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Room Thermometer Indoor Hygrometer Humidity Meter Gauge Digital Temperature and Humidity Sensor Monitor for Home Office House Pets Plants - AAA Battery Included

$19^.99

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SNZB-03P Zigbee Motion Sensor, 3-Year Battery Life, for Alert System and Automations Wireless Motion Detector, Zigbee Bridge Required, Batteries Included (1 Pack)

$35^.99

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Zigbee Smart Garage Door Tilt Sensor, Adjustable Sensitivity Levels, 2-Year Battery Life, Zigbee Hub Required

$38^.99

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Human Presence Sensor with Light Sensor, 24G Radar Battery Powered | High-sensitivity Radar Detection, Historical Recording, Zigbee Hub Required, Support Home Assistant Zigbee2mqtt

$40^.99

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2.0 WiFi Hygrometer Thermometer with Gateway, Mini Sensor 3-Pack | Temperature and humidity monitor with APP alert, 2yr data & battery, indoor for wine cellar/bedroom/basement, 2.4G Wi-Fi only

$85^.99

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Volume Discounts:$82.99 - $85.99

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Indoor Outdoor Thermometer Wireless Weather Station, Temperature Humidity Monitor Battery Powered Inside Outside Thermometers with 330ft Range Remote Sensor and Backlight DisplayMetal Black

$45^.99

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Volume Discounts:$42.99 - $45.99

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IP65 Indoor Outdoor Hygrometer Thermometer Wireless 3Packs, 394ft Bluetooth Range, Refrigerator Thermometer, Dewpoint/VPD/Absolute Humidity Sensor, 2-Year Battery Life, Free Data Storage

$61^.99

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Volume Discounts:$58.99 - $61.99

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Solar Indoor Thermometer Hygrometer, Max/Min, Comfort Meter (3 Pack) | Solar & Battery Dual Power |No Setup or App Required |Clear Comfort Level Indicator |Flexible Desk or Wall Placement

$51^.99

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Volume Discounts:$48.99 - $51.99

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Indoor Thermometer Humidity Meter with Backlight Solar Powered | Room Temperature Monitor with Max/Min Clear Record&Comfort Indicator Digital Hygrometer for Home Office, Battery Backup,1Pack

$28^.99

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Volume Discounts:$25.99 - $28.99

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Smart Temp & Humidity Sensor, LoRa Long Range, 2 Year Battery, Indoor Monitoring for Wine Cellar, Bedroom, Nursery, Greenhouse, RV, with App, Email & SMS Alerts, Alexa IFTTT, 2 Pack + Hub

$89^.19

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48V/60V/64V/72V universal intelligent dual-mode electric vehicle brushless controller 1200-1500W three-speed adjustment

$43^.89

More options from $43.89 - $46.99

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Volume Discounts:$43.59 - $43.89

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Waterproof 3 Inch Flow Meter for Hot/Cold Water, Fuel & Liquids ±1% Accuracy, 360° Rotatable Screen, 20-260 GPM, NPT Female Thread, Supports Gallon, Liter, GPM, LPM, m³, QTS, PTS

$229^.95

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IPX8 Metal Water Flow Meter, ±1% Accuracy, Garden Hose/RV/Sprinkler, Outlasts Plastic | Large Screen | 3/4" GHT Brass Connector | Supports Gallon, Liter, GPM and LPM

$99^.95

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Outdoor Motion Sensor, 1 Pack, Automatic Dusk to Dawn, Sensor Turns Lights On When Motion is Detected, Requires Bridge, Works with Alexa, Google Assistant, and Apple HomeKit, Weatherproof

$52^.99

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ismartgate Wireless Waterproof tilt Sensor. Compatible with sectional and tilt Garage Doors. Requires ismartgate hub.

$87^.90

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AJMRTC 3Pcs MINI SR602 PIR Motion Sensor Module, Pyroelectric Infrared Human Body Detection Switch Module, Adjustable Delay Time for Arduino Smart Light Home Automation

$21^.09

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ZWP Replacement Remote Control Compatible for Homestock 99787W 58307W, Richmat HJH103, Malouf iPowr M255 E255 Adjustable Bed Base

$156^.18

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Zigbee Presence Sensor, Built-in Temperature, Humidity and Light Sensor | Zigbee Millimeter Wave Radar Sensor, Zigbee Hub Required, Supports Home Assistant Zigbee2mqtt

$59^.99

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Digital Hygrometer Indoor Thermometer, Humidity Monitor with Calibration | Digital Temperature & Humidity Gauge, Clear LCD Display with Clock, Comfort Indicator for Home, Office, Basement & Greenhouse

$26^.99

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Volume Discounts:$23.99 - $26.99

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Nest Temperature Sensor (2nd Gen) - Room Comfort Sensor with Scheduling - Works with The Nest Learning Thermostat (3rd and 4th Gen) and Nest Thermostat E - Porcelain, White

$68^.99

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$94^.99

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Nest Temperature Sensor (2nd Gen) - Room Comfort Sensor with Scheduling - Works with The Nest Learning Thermostat (3rd and 4th Gen) and Nest Thermostat E - Porcelain, White

$68^.99

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Sustee Aquameter, Set of 4, Plant Soil Moisture Sensor, (Green, Small)

$39^.99

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Volume Discounts:$36.99 - $39.99

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SNZB-02P Zigbee Temperature Humidity Sensor, Indoor Thermometer Hygrometer with Alert, Works with Alexa & Google Home for Remote Monitoring and Home Automation, ZigBee 3.0 Hub Required (1)

$35^.99

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Waterproof 2 Inch Water Flow Meter for Hot/Cold Water, Fuel & Pool 16160 GPM | High-Capacity | Digital Turbine Flowmeter | NPT Thread

$179^.99

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302-1408-TBP Indoor Comfort Meter with Time & Date

$34^.99

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SNZB-02M AirGuard TH Pressure Zigbee Temperature Humidity Sensor | Zigbee Smart Thermometer Hygrometer Barometer with App Alerts, Remote Monitoring for Greenhouse & Wine Cellar

$38^.99

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SNZB-02P Zigbee Temperature Humidity Sensor, Indoor Thermometer Hygrometer with Alert, Works with Alexa & Google Home for Remote Monitoring and Home Automation, ZigBee 3.0 Hub Required (1)

$36^.99

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TP50 Digital Hygrometer Indoor Thermometer Room Thermometer | Humidity Meter Humidity Gauge with Temperature Humidity Monitor for House Office Celler Kitchen Greenhouse RV

$27^.99

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TEMPIQ Remote WiFi Temperature & Humidity Sensor - App Integration, Alerts, Helps Monitor 2nd Home, AirBnb, RV, Pets,Freezer and Server Room, Indoor & Outdoor Hygrometer & Thermometer

$104^.19

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TempAir Digital Hygrometer Indoor Thermometer Humidity Monitor | Humidity Meter Room Thermometer Humidity Gauge with Temperature Humidity Monitor for House Celler Kitchen Greenhouse, 4 Pack

$72^.99

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Volume Discounts:$69.99 - $72.99

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