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SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (S31)

Model: S31 · SKU: S31

Prepared Nov 12, 2026

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Common specifications

Device type	Smart plugSource [1]
Max switched load (A)	15 ASource [1]
Max switched load (W)	Not documented
Measurement channels	Not documented
Current sensors	Not documented
Current rating	Not documented
Voltage range	Not documented
Accuracy	Not documented
Communications	Wireless Standard 2.4GHz, 802.11 b/g/nSource [1]
Display	Not documented
Power input	Voltage Input 120V AC 60HzSource [1]
Mounting	Not documented
Safety listing	Not documented
Weight	Not documented
Dimensions	Not documented
Enclosure volume	Not documented
Warranty term	2 yearsSource [1]

All recorded specifications

Communications	Wireless Standard 2.4GHz, 802.11 b/g/nDocumented claim Conditions Printed as "Wireless Standard 2.4GHz, 802.11 b/g/n". Location: Product page and documents as quoted Printed as "Wireless Standard 2.4GHz, 802.11 b/g/n". Location: Product page and documents as quoted Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]
Device type	Smart plugDocumented claim Conditions Printed as "WiFi Smart Plug with Energy Monitoring US Type"; "Note: Only S31 supports energy monitoring. S31 Lite does not include energy monitoring functionality.". Location: product title Printed as "WiFi Smart Plug with Energy Monitoring US Type"; "Note: Only S31 supports energy monitoring. S31 Lite does not include energy monitoring functionality.". Location: product title Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]
Max switched load (A)	15 ADocumented claim Conditions Maximum switched load printed as "Max. Current 15A". Location: spec table Maximum switched load printed as "Max. Current 15A". Location: spec table Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]
Operating temperature	0 to 30 °C32 to 86 °F convertedDocumented claim Conditions Printed as "Working Temp 0 °C ~ 30 °C". Location: spec table Printed as "Working Temp 0 °C ~ 30 °C". Location: spec table Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]
Power input	Voltage Input 120V AC 60HzDocumented claim Conditions Printed as "Voltage Input 120V AC 60Hz". Location: Product page and documents as quoted Printed as "Voltage Input 120V AC 60Hz". Location: Product page and documents as quoted Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]

Warranty

Warranty term	2 yearsDocumented claim Conditions Printed as "2-Year Hassle-Free Warranty". Location: store service bar beside Add to cart (store policy wording) Printed as "2-Year Hassle-Free Warranty". Location: store service bar beside Add to cart (store policy wording) Official product page · SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026) [1]

Certificate records

No records documented.

Sources and revisions

SONOFF product page: SONOFF S31 WiFi Smart Plug with Energy Monitoring US Type (captured October 12, 2026)Official product page · Checked Oct 12, 2026https://sonoff.tech/products/sonoff-s31-s31-lite-compact-design-smart-plug-with-energy-monitoring-us-type
SONOFF S31 / S31 Lite user manual foldout (V1.3, drawing dated 2025/02/28)Official user manual · Revision V1.3 · Checked Oct 28, 2026https://cdn.shopify.com/s/files/1/0742/9963/8001/files/User_Manual_S31_S31_Lite_V1.3.pdf?v=1748417766