LittleHippo Kelvin Color Changing Night Light, Room Thermometer and Hygrometer (Humidity Monitor) for Nursery, Baby's Bedroom, Child's Room
Condition: New
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FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 3 left in stock, order soon!
Arrives
Jun 22 – Aug 1
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Features
- COLORFUL ROOM TEMPERATURE MONITORING: KELVIN changes colors depending on whether the room temperature is too hot, too cold or just right! Red for too hot, Amber for just right, and Blue for too cold.
- HUMIDITY CONTROL FOR HEALTHY LIVING: Keep your family's health in check with KELVIN's built-in hygrometer. This digital humidity monitor ensures you're always aware of your room's moisture levels, guarding against congestion, stuffy noses, and dryness. Maintain an ideal indoor atmosphere effortlessly.
- PERSONALIZED COMFORT CONTROL: With KELVIN, effortlessly align the temperature range to match your physician's guidance through its user-friendly interface, putting your family's comfort squarely within your control.
- FROM NURSERY TO NIGHT LIGHT: A beloved choice on baby registries, KELVIN is an indispensable tool for monitoring temperature and humidity during those precious early months. As your child grows, KELVIN seamlessly transforms into a comforting night light, ensuring a soothing atmosphere in the nursery or bedroom.
- DURABLE AND SECURE: Rest easy knowing that KELVIN by LittleHippo is built to last with its robust, child-friendly construction. It holds a series of safety approvals, ensuring the utmost protection for your little ones.
Is Discontinued By Manufacturer : No
Package Dimensions : 5.24 x 5.16 x 4.37 inches; 5.64 Ounces
Item model number : KHTH-01
Date First Available : January 12, 2018
Best Sellers Rank: #13,264 in Baby (See Top 100 in Baby) #183 in Nursery Night Lights #874 in Night-Lights
#183 in Nursery Night Lights:
#874 in Night-Lights:
Customer Reviews: 4.4 out of 5 stars 1,130 ratings
Brand: LittleHippo
Special Feature: Color Changing, Plug In, Portable
Color: White
Age Range (Description): Baby
Included Components: Adapter
Outer Material: Acrylonitrile Butadiene Styrene
Specification Met: FCC, RoHS
Display Type: Color-changing lights
Connectivity Technology: Usb
Product Care Instructions: Wipe Clean
Is Discontinued By Manufacturer : No
Package Dimensions : 5.24 x 5.16 x 4.37 inches; 5.64 ounces
Item model number : KHTH-01
Date First Available : January 12, 2018
Manufacturer : LittleHippo
Best Sellers Rank: #21,825 in Baby (See Top 100 in Baby) #348 in Nursery Night Lights
#348 in Nursery Night Lights:
Customer Reviews: 4.4 4.4 out of 5 stars (1,321)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jun 22 – Aug 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Really great night light for a kid's room. We originally had the gro-egg, but decided to give this one a try for our newest born. The KELVIN is so much better in many ways: 1) it's cheaper, 2) you can toggle between Fahrenheit and Celsius (which is great since we use F in the US and gro-egg only comes in Celsius), 3) comes with a US plug, 4) you can actually choose your temperature ranges, 5) and it even displays humidity. I did a test to see if the product had accurate reading levels. Temperature showed 1 degree difference compared to my thermostat. Humidity level seems right given that we use a humidifier, although humidity levels can have a much bigger variance than temperature. But as long as it's within 5%, it's probably okay. It is more expensive than a regular night light but you're getting a lot of features, so in my opinion, it's worth it.
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Reviewed in the United States on March 19, 2018 by D.H
The cutest and one of the most useful little thing in my son's nursery. The size is perfect, the colors are great and works great as a nightlight as well! My husband and I love being able to know my son's room temperature just looking at Kelvin and checking on its color. I also must say a huge thanks to Stephanie for the best customer service I ever had!
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Reviewed in the United States on February 26, 2025 by Day Gomez
Easy to setup, just plug it in and it's all set to go. The humidity monitor is a nice feature. I bought it because the baby monitor was reading very high temperatures in the nursery so I wanted to make sure it was correct. I really like the soft orange glow when the temp is in the comfortable range. It's light enough to walk around but not so bright it's distracting- I like it better than the sound machine/nightlight I have. The colored glow makes it easy to just peek in and make sure the temp is fine. Great product for the money and it's cute.
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Reviewed in the United States on November 30, 2018 by Cathleen
This little gadget has some major potential and is almost perfect. The temperature is so easy to read plus the different lights coordinating with the temperature is genius and makes it so easy for a sleep deprived parent. However...I'm sending mine back for a few reasons. 1. It doesn't have the option of it working on a battery. The cord is also too short. 2. No option of mounting it on a wall. Not even a hole on the back to hang on a simple screw. 3. Biggest problem I had is how bright the lights are. No way of dimming it. Even with the nightlight off, it's still to bright. My 15 month old was super distracted by it and couldn't sleep. I covered it with a burp cloth and still too bright. Also, how amazing would it be if it was Bluetooth compatible and you could just check the temperature from bed?
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Reviewed in the United States on November 30, 2020 by Amazon Customer
I LOVE THIS LITTLE DEVICE!! My husband and I can never agree on the temp in the room/house so one of us is constantly too hot or too cold, pregnancy made it even worse. We plug this is and it tells us immediately the temp in the room and changes colors according to what baby needs. You can even change the temp range if you like or need. It's seriously the easiest, most appreciated gift we got at our baby shower! We loved it so much we bought a second one so there's one in the bedroom/nursery and one in our living room. Highly recommend!
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Reviewed in the United States on June 30, 2019 by Calley
I liked it at first, until I realised turning the blue / orange / red light on changes his temperate! The light on makes him read bitter and light off makes him read cooler - flaw in the design
Reviewed in the United States on November 26, 2025 by Zimmy
Edit: apparently it is not normal for this to read lower than normal and seller offered me a full refund. Much appreciated. Reads a few degrees lower than actual room temp
Reviewed in the United States on December 9, 2025 by Melania Christopher
Our son was born a little over a week ago and this little thermostat has given us peace of mind with all regards to the room temperature. Our house runs a little cool so we're using the heater to make it much warmer for baby, but at the same time you done want to go too much, so that's where the Kelvin color changing night light comes into play! This is very easy to use as it clearly indicates whether the room is too hot, too cold, or just right. There is also a humidity gauge for anyone who wants to know the moisture levels in the room. The light itself is not too bright, but enough to see the baby in a dark room, so you can feel safe while getting some necessary shut-eye. Overall, great product. Will very likely buy another one for the living room as well!
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Reviewed in the United States on November 21, 2018 by Itai