Will this fit into a standard outlet/switch box in the wall?

In my opinion, it would be tight if you could get it in. Plus, you wouldn't have access to the power switch if needed.

Can I use this for my electric dryer? To notify me when it finished?

You can use it for electric dryer as long as its current rating is below 16Amp (or 20 Amp) - depends on the model you have. As for notification - it does not have such the function, however, you can see if the elctric dryer is On or Off by checking Amp readining (current) on the screen (either on the unit iteself or eWelink application).

Would this support 10volts for the lowest cuttoff setting?

It does not have such functionality (undervoltage relay)

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SONOFF POWR320D Elite 20A WiFi Smart WiFi Wireless Light Switch with Energy Monitoring, Universal DIY Module for Smart Home Automation, Works with Amazon Alexa & Google Home, No Hub Required

SONOFF POWR320D Elite 20A WiFi Smart WiFi Wireless Light Switch with Energy Monitoring, Universal DIY Module for Smart Home Automation, Works with Amazon Alexa & Google Home, No Hub Required

Product ID: 507579321

Details

Connector type
Screw
Contact type
Normally
Current rating
15 Amps
Operating voltage
240 Volts
Operation mode
automatic

⚡20A max load power

📊6-month real-time energy tracking

🔌WiFi & voice control

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215.74 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Empower your space with smart energy mastery!

SAFETY FIRST ALWAYS - Customizable overload protection to safeguard your appliances
POWER UP YOUR SMART HOME - Supports up to 20A load for seamless appliance integration
ULTIMATE CONTROL FREEDOM - Manage devices remotely via app, Alexa, or Google Home—no hub needed
DATA DRIVEN ENERGY SAVINGS - Track and export 6 months of hourly power consumption data
INSTANT INSIGHTS ON DISPLAY - Built-in LCD screen shows real-time voltage, current, and power stats

The SONOFF POWR320D Elite is a cutting-edge 20A WiFi smart switch featuring a lightning-fast ESP32 chip, real-time energy monitoring with a clear LCD display, and 6-month historical data export. It offers versatile control via app, voice assistants, and LAN without requiring a hub, while ensuring appliance safety through customizable overload protection. Perfect for the tech-savvy professional aiming to optimize home energy use with precision and style.

Specifications

ASIN	B09XB3RZB9
Actuator Type	Hinge Lever
Best Sellers Rank	#71,741 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #28 in Home Automation Modules
Brand Name	SONOFF
Circuit Type	1-way
Color	White
Compatible Devices	Alexa/Google Home Compatible Devices
Connectivity Protocol	Wi-Fi
Connector Type	Screw
Contact Material	Metal
Contact Type	Normally Closed
Control Method	Voice
Control Type	voice, app, LAN
Controller Type	Amazon Alexa
Current Rating	15 Amps
Customer Reviews	4.4 4.4 out of 5 stars (720)
International Protection Rating	/
Item Dimensions	10 x 10 x 10 millimeters
Item Weight	140 Grams
Lower Temperature Rating	70 Degrees Celsius
Manufacturer	SONOFF
Material Type	Polycarbonate
Model	POWR320D
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	1
Operating Voltage	240 Volts
Operation Mode	automatic
Part Number	POWR320D
Smart Home Compatibility	Smart Home Compatible
Specification Met	CE, UL
Switch Type	TRIAC
Terminal	Screw
Unit Count	1.0 Count
Upper Temperature Rating	40 Degrees Celsius
Wattage	4800 watts

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