Certified Open Box

Emerson Sensi Smart Programmable Thermostat - White (ST55)

Baily Store
(3427)
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US $49.95
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Condition:
Open box
“New Open Box condition”
4 available4 sold
Included services
1-year warranty from Allstate Protection Plans included. Learn more
Popular item. 4 have already sold.
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Located in: Hoffman Estates, Illinois, United States
Delivery:
Estimated between Fri, Oct 10 and Wed, Oct 15 to 94104
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Certified Open Box

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Quality Approved Sellers
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This item has a 1-year Allstate Protection Plans warranty included.
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eBay item number:226830986025
Last updated on Sep 30, 2025 13:27:23 PDTView all revisionsView all revisions

Item specifics

Condition
Open box
An item in excellent, new condition with no wear. The item may be missing the original packaging or protective wrapping, or may be in the original packaging but not sealed. The item includes original accessories. The item may be a factory second. See the seller's listing for full details and description. See all condition definitionsopens in a new window or tab
Seller Notes
“New Open Box condition”
UPC
0786710554827
Power Source
Corded Electric, Battery
MPN
ST55
Year Manufactured
2019
Wire Configuration
4-Wire
Battery Size
AA
Compatible Product
Universal
Smart Home Compatibility
Apple HomeKit, Wink, Google Home/Assistant, Amazon Alexa, Samsung SmartThings
Control Style
Remote Control, Push Button, App Control, Digital, Touch, Voice
Display Size
5 in (12.7 cm)
Voltage
24 V
Heat Stages
1
Features
Built-In WiFi, Bluetooth, Wi-Fi, Remote Control, Low Battery Indicator, Smart Connectivity, App Control, Filter Replacement Indicator, Touch Screen, Adjustable Thermostat, Night Light, Automatic Changeover, Digital Display, Battery Backup, Daylight Savings Time Ready
Compatible Brand
Oil, electric dual fuel, Geothermal, Gas, Emerson
Thermostat Programmable Days
7- Day
Color
White
Compatible Model
ST55
Material
Plastic
Brand
Emerson
Thermostat Shape
Rectangular
Mounting
Wall-Mounted
Sensor Technology
Temperature
Voltage Type
Low Voltage
Number of Periods per Programmable Day
4
System Switching
Auto
Model
Emerson Sensi
Cool Stages
1
Programmability
Programmable
Category

About this product

Product Identifiers

Brand
Emerson
MPN
ST55
UPC
0786710554827
Model
Emerson Sensi
eBay Product ID (ePID)
17033941015

Product Key Features

Power Source
Corded Electric, Battery
Year Manufactured
2019
Battery Size
AA
Compatible Product
Universal
Control Style
Remote Control, Push Button, App Control, Digital, Touch, Voice
Compatible Brand
Oil, electric dual fuel, Geothermal, Gas, Emerson
Color
White
Thermostat Shape
Rectangular
Mounting
Wall-Mounted
Number of Periods per Programmable Day
4
Cool Stages
1
Programmability
Programmable
Wire Configuration
4-Wire
Smart Home Compatibility
Apple HomeKit, Wink, Google Home/Assistant, Amazon Alexa, Samsung SmartThings
Display Size
5 in (12.7 cm)
Voltage
24 V
Heat Stages
1
Features
Built-In WiFi, Bluetooth, Wi-Fi, Remote Control, Low Battery Indicator, Smart Connectivity, App Control, Filter Replacement Indicator, Touch Screen, Adjustable Thermostat, Night Light, Automatic Changeover, Digital Display, Battery Backup, Daylight Savings Time Ready
Thermostat Programmable Days
7- Day
Compatible Model
ST55
Material
Plastic
Sensor Technology
Temperature
Voltage Type
Low Voltage
System Switching
Auto

Dimensions

Item Height
3.75 in
Item Weight
0.55 lb

Item description from the seller

About this seller

Baily Store

99.1% positive feedback•12K items sold

Joined Jan 2023
Usually responds within 24 hours
Thank you for visiting Baily, where customer satisfaction is our top priority. We are committed to delivering the best shopping experience by offering high-quality products and exceptional service. ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.8
Reasonable shipping cost
4.9
Shipping speed
5.0
Communication
5.0

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Seller feedback (3,694)

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  • e***_ (30)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    The first pair I received had a non-working left earbud, but the seller responded promptly and shipped a replacement within 24 hours. Outstanding service! The new pair works perfectly, was well-packaged, and exactly as described. Great value—I’ll definitely buy from this seller again.
    Beats Flex Wireless Earbuds Apple W1 Headphones Chip Magnetic Earphones - Yellow (#226881729680)
  • b***p (2235)- Feedback left by buyer.
    Past month
    Verified purchase
    "Logitech MX Mechanical Wireless Illuminated Performance Keyboard READ/FOR PARTS" As Described. Seller's Communication was Outstanding! Completely Open and Honest about the Condition of this Keyboard. Seller Packaged this Keyboard with Padding in its Original Factory Box and Packaged this Box inside a Shipping Box to Protect it Well during Shipping. Seller Shipped Fast and USPS Priority Mail Delivered Fast This Purchase was a Great Value for Me. It will help Me Decide if I want to Buy it New.
    Logitech MX Mechanical Wireless Illuminated Performance Keyboard READ/FOR PARTS (#226979693675)
  • s***r (178)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Motherboard as described. Packing department is lacking. I’m not a first time customer. This would be my 4th order from them and it’s hit or miss with being packed mindfully. Mobo was packed in a dinky box. No CPU cover or attempt to protect it and three pieces of packing paper to hold it all together. I brought this up to the seller and they were accepting of constructive criticism. I’m a regular buyer from them regardless of the small set backs. They have good products and prices for my wants.
    ASUS ROG STRIX X870-F GAMING WIFI AM5 AMD ATX DDR5 Wi-Fi 7 Motherboard (#226710361969)
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Product ratings and reviews

Learn more
4.3
25 product ratings
  • 18 users rated this 5 out of 5 stars
  • 3 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 3 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 25 reviews
  • by jfsheu_bay
    Jul 16, 2023Top favorable review

    good thermostat but some improvements needed.

    easy to set up and install. user friendly app is provided for the unit. However, some improvements can be made for trend data. My previous wifi thermostats do provide temperature change historical chart. This help me to judge performance of my heating system while I was traveling overseas during winter season. Sensi thermostat only provides temperature reading at the time when I open the app. I have no way to know the readings one hour ago unless I keep watching it.

    Verified purchase: YesCondition: Pre-OwnedSold by: relax_and_take_five

  • by jowig67
    Mar 18, 2024

    3rd Sensi, and would buy again.

    Very good product, without problem. Setup was a little challenging, but their techs helped us get it working on our system. We own 3, at different locations. Would buy a gain.

    Verified purchase: YesCondition: Pre-OwnedSold by: goods-f-less

  • by johaddi-0
    Jan 12, 2025

    I have been using Sensi ST-55s in three ...

    I have been using Sensi ST-55s in three residential places, two states, and with two internet providers. I have had no problems with this item or its installation. It is a quality product, and I am now using it with two wire condensation boilers without a C-wire.

    Verified purchase: YesCondition: NewSold by: house-of-gold

  • by saleps
    Jan 23, 2024

    Great and smart thermostat will save its users money..

    The Emerson Seni Smart thermostat works well and is easy to program from my smartphone.

    Verified purchase: YesCondition: NewSold by: benjwashi_3729

  • by wadegblakey
    Jul 05, 2025

    Best Smart Thermostat

    The Sensi Smart Thermostat is the best all-around smart thermostat available. Easy to install and setup. Easy to program schedules. Great intuitive App. Easy to override manually for non- techies.

    Verified purchase: YesCondition: Pre-OwnedSold by: alexnew-23

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