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🌟 Project your time, temperature, and style—never miss a beat or a forecast!
The SMARTRO SC31B is a sleek digital projection alarm clock featuring dual alarms with snooze, indoor/outdoor temperature projection, and an 8-color backlit LCD. It includes a USB charging port for your devices and offers a 12-hour weather forecast with barometric trend tracking. Powered by AC with battery backup, it ensures continuous operation and memory retention during outages, making it a perfect blend of functionality and modern bedroom tech.








| ASIN | B07CJ2ZNLK |
| Additional Features | Adjustable Brightness, Alarm, Calendar Display, Charging Port, Projection Clock |
| Alarm Clock | Yes |
| Batteries are Included | No |
| Best Sellers Rank | #113,996 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #13 in Projection Clocks |
| Brand | SMARTRO |
| Brand Name | SMARTRO |
| Clock Form | Travel |
| Color | Black |
| Connectivity Technology | Power Adapter |
| Customer Reviews | 4.3 out of 5 stars 5,900 Reviews |
| Dial Color | Black |
| Display Type | LCD |
| Frame Material | Plastic |
| Included Components | adapter cord, manual, remote sensor |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions W x H | 5.28"W x 3.15"H |
| Item Weight | 150 Grams |
| Manufacturer | SMARTRO |
| Manufacturer Part Number | SC31B |
| Material Type | Plastic |
| Model Number | SC31B |
| Mounting Type | Tabletop |
| Number of Batteries | 2 AAA batteries required. |
| Number of Items | 1 |
| Operation Mode | Electrical |
| Power Source | Corded Electric |
| Product Dimensions | 5.28"W x 3.15"H |
| Room Type | Bedroom |
| Screen Size | 3 Inches |
| Shape | Rectangular |
| Size | Small |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Adjustable Brightness, Alarm, Calendar Display, Charging Port, Projection Clock |
| Style | Digital |
| Style Name | Digital |
| Theme | Plain |
| UPC | 604213902313 604213902337 604213904249 604213904348 604213904218 604213901712 604213904270 604213904195 604213904294 604213904201 604213904256 604213904355 604213904225 604213904324 604213904263 604213904362 604213904287 604213904232 604213904331 |
| Unit Count | 14.24 Ounce |
| Warranty Type | 13-month warranty |
| Watch Movement | Automatic |
K**T
LOVE IT!!
Very satisfied!!! The projection time is large numbers clear and easy to read. I love that you can turn the projection on or off. No need for it to be on in the daylight. I love that you can choose the color of the light on the display and also you can completely turn the display light off. But at night all you have to do is touch the top and the light will come on for a few seconds and then shut back off, love that! Love the two separate alarm settings. Love that it has a USB port to charge my phone. And my absolute favorite part is IT HAS AN ACTUAL CORD THAT PLUGS IN TO THE OUTLET NOT JUST A USB ADAPTER WITH A CORD. Those USB adapters get hot when left plugged in 24/7 Great bonus that it gives you the outdoor and indoor temperature on the screen as well as on the projection! All in all, this is a great little alarm clock at a fair price!! Checked all my boxes Now, let’s hope it lasts for a long, long time? I had my other one that was a different brand for 20 years before the projection stopped working.
S**K
Great digital clock on time/indoor outdoor temp projector
Great looking and working digital clock with indoor and outdoor temp display also included. You can select from multiple colors for screen display. Also projects all of this on wall or ceiling in red color. Very nice!
M**M
Fine replacment for a 25 year old gem
I had to replace a clock that projected, from Sharper Image 25 years ago. The new one is much easier to use. The projection is brighter than my old one. Not so sure i like that. I really like the size. If you are looking for a projection clock i recommened it.
F**I
Great product with no parallel but sadly the outdoor temp sensor stopped working. (Edited)
Edited Review: 3 stars -> 5 stars Ok, so based on my original review below after 6y of owning the clock and buying a 2nd clock I was so surprised they sent me an email based on my review and sent me a replacement sensor. The new sensor paired immediately with the clock on Ch 1 and is also the newer model which has a small LCD display on it. Now this is just amazing service honestly. I mean, after so many years, they still supported me this way. I liked their product that this was my 2nd purchase of it. Now I'm going to go ahead and support them and have gotten a couple more folks to buy this product via Amazon simply because this sort of support is just amazing. The sensor is paired and now projecting the outdoor temp again on the night ceiling and I no longer have the "--" after months of this. I can't tell you how happy it makes me to have things that now work as intended and the little joy it gives you. Thank you SmartPro. Original Review: So I bought this product because honestly there is no other product that is equivalent to it. It can project indoor and outdoor temp (via a remote sensor) and it has multiple colors or turn it off for no glare at night and reversible projection display (red color only) and it works wonderfully. Sadly one day the outdoor sensor just randomly died and stopped functioning. This was after I bought this unit a 2nd time having used it before. The best part was the outdoor temp honestly. Also the main LCD display got all weird but as long as it projects I'm good with it. Still will likely buy it again for the 3rd time simply for the nice indoor + outdoor temp cycle and excellent wall projection of time. Very useful at night. Shockingly I don't see other products that can do this.
M**W
Love this time/temp display
As described
4**M
It's alright
I kept my purchase, however I do wish I had purchased something else. I like some of the features like the easy to read digital, ability to change the digital colors, the projection is cool, the alarms are not super loud or obnoxious but it's effective, dual alarms are nice, and I like the light touch to the top snooze feature. My biggest complaint is that it's so lightweight that it gets knocked over all the time. The cord seems heavier than the alarm clock which makes it even more prone to being knocked over. Next biggest complaint is that the outdoor thermostat is basically useless for me because it's not weatherproof. I have no awnings or porch covers on my house so there is really no place to keep it dry and out of the elements, and if the sunlight shines directly on the sensor the temp readings get extremely inflated. Why not just manufacture this correctly to where it's encased in something water resistant? Seriously! It's a bogus feature! Right now I have the stupid sensor in my garage, but I could really care less what the temp of my garage is. Also, my alarm clock didn't come with a box or instructions which was annoying. If that happens to anyone else, just come back to the original listing here and there is a pdf download of the instructions here, so that was helpful.
A**D
It is essential
We can see the time, in the middle of the night, without fully waking up and go back to sleep. It has a power cord and a backup battery. So, if it is accidentally unplugged or power to the entire area is lost, the alarm clock will still wake you up. You can have two(?) different alarm times. You can choose the color of the display and projection. And, you can adjust the position of where the projection is placed. And, with the temperature sensor outside, you have a reliable, personal and immediate estimate of how much clothing you need. I rarely use the USB charger but I know it works. Two things yu need to know if you buy this clock: If the display on the clock is off, push the power plug into the back of the clock. The power cord plug end going into the clock is like a laptop plug and it can come out a tiny bit but look like it is in. If it the clock is accidentally dropped or you move around other things where the clock is, that plug might come out. And, if you have the clock resetting it's time from the external radio signal., the display turns off during that time. Mine turns off at about 3am every morning (for an hour?). Sometimes, when I push the plug in or turn the alarm off, I accidentally push the button changing the color of the display. Then, I have to figure out how to change it back or actually read the instruction manual. Don't lose the instruction manual!
K**M
Perfect for What I Wanted
I wanted a clock that shows on the ceiling at night, while not using the clock face. I have been using this type of clock for years, but this is the best one I have ever used. This clock shows the time & inside & outside temps on the ceiling very clearly at night. During the day it is harder to see, but I have a wall clock for day. The screen was a little bright for night time, so I was able to turn it totally off. It is very easy to program and is half the size of other alarm clocks so it doesn't take up a lot of space on the nightstand. The temperature monitors are very accurate. I tested it with another thermometer. I I will be buying more of these for other bedrooms in my house.
R**G
Projection and Weather
P**.
More than a clock
Only had it running a short time but this is a great unit. I bought it for the projector capability, but it has a heap of other features. Finding the outside temperature facility is a real bonus. The two separate alarm settings are another convenient feature. Despite the number features found it easy to set up. The seller was very helpful and easy to deal with. If purchasing for use in Australia be aware the included power adapter has US pin configuration. I recommend both the clock and the seller.
W**G
Great item
Great clock. I like the crisp display and the projection as well. The set up is easy. Worth buying.
A**Z
Excelente
Cumple con su objetivo. Los números de buen diseño y visibilidad impecable.
L**N
Cette appareil vaut son prix et fonctionne très bien.
Appareil fonctionne très bien. Fort utile surtout la nuit. Luminosité fort agréable et informations affichées sont un résumé rapide des données.
Trustpilot
2 months ago
3 weeks ago