the output voltage is ac or dc?

It is a AC 16V30VA Transformer for Dooebell or thermostats

Does this doorbell transformer apply to nest hello wifi doorbell?

A doorbell with a working voltage of 16V can be used,such asRing Video Doorbell，Ring Doorbell Pro，Zmodo Smart Greet Wi-Fi Video Doorbell，Ezviz Doorbell，Eufy 2K wifi wifeless doorbell,Netatmo video doorbell,night owl doorbell,skybell slim line doorbell camera,yiroka doorbell camera,Maximus kuna doorbell camera,Arlo Doorbell and etc.

What is the operating temperature of this 16v ac transformer? need to install in attic with 130+ degrees f.

Well it depends on what you are hooking the transformer up to, as far as the atmosphere air temperature that high should not be a problem, but, if you are going to use it to install a vent fan the temperature won't be that high it will be a lot less, just make sure the device will operate with this transformer.

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24V 40VA Doorbell Transformer

Product ID: 422979702

Details

Brand
GIVEUBED
Current Rating
40 A
Mounting Type
Plate Mount
Power Source
AC
Product Dimensions
1.3"D x 1.9"W

⚡40VA high power output

🔌24VAC ±5% stable voltage

🛠️Easy screw or clip installation

HK$385

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

⚡ Empower your smart home with unmatched reliability!

ROBUST READY - 40VA capacity ensures no more underpowered devices slowing you down
EFFORTLESS INSTALLATION - Mounts easily with screws or clips—upgrade your setup in minutes
PEACE OF MIND GUARANTEE - Backed by responsive customer service with refund or exchange options
UNIVERSAL COMPATIBILITY - Works flawlessly with Ring, Ecobee, Nest, Sensi & more
POWER UP YOUR SMART HOME - Reliable 24V AC output powers multiple thermostats & doorbells seamlessly

The GIVEUBED 24V 40VA Doorbell Transformer delivers a stable 24VAC ±5% output at 40VA capacity, compatible with most major smart thermostats and doorbells including Ring, Ecobee, Nest, and Sensi. Designed for easy installation with screw or clip mounting, it supports multiple devices simultaneously, ensuring your smart home runs smoothly without power hiccups. Rated 4.4 stars with strong customer support and a satisfaction guarantee, this transformer is a must-have upgrade for any modern residential or commercial setup.

Specifications

ASIN	B09PYKZYSM
Best Sellers Rank	#19,779 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Door Bell Transformers
Brand Name	GIVEUBED
Current Rating	40 A
Customer Reviews	4.4 4.4 out of 5 stars (768)
Item Dimensions D x W x H	1.3"D x 1.9"W x 2.6"H
Item Highlight	AC Power Supply Compatible with Most Versions of Ring Doorbell,Compatible with Ecobee,Nest,Sensi Thermostat Etc
Item Weight	700 g
Manufacturer	YU ER
Maximum Frequency	60 hertz
Minimum Frequency	60 hertz
Model	24V40VA
Mounting Type	Plate Mount
Number of Items	1
Number of Packs	1
Part Number	24V40VA
Power Source	AC
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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HK$385

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Good experience, but the tracking updates could be better.

2 months ago

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