Specs
StopWatt technical specifications
The technical details of the device, stated plainly.
- 60-day money backTest it for a full billing cycle
- Free worldwide shippingShips in 1–2 business days
- Secure checkoutEncrypted card processing
- Human supportReal people, real replies
Quick answer
The unit operates on a 90V–250V supply through a standard household outlet. It is not intended for hard-wired 240V appliance circuits.
Electrical
| Specification | Detail |
|---|---|
| Device type | Passive plug-in power-factor correction unit |
| Operating voltage | 90V – 250V AC |
| Frequency | 50 / 60 Hz |
| Connection | Standard grounded household wall outlet |
| Status indicator | LED indicator confirms the unit is powered |
| Coverage guidance | Approximately 800–1,200 sq ft per unit |
Physical
- Compact wall-plug housing in flame-retardant ABS-style casing.
- No moving parts, no fan, no audible operation.
- Designed for continuous indoor use in dry locations.
In the box
- StopWatt unit(s) — 1, 2 or 3 depending on the bundle
- Quick-start placement card
- Retail packaging suitable for gifting
Usage limits
- Indoor use only; keep dry.
- Plug directly into a wall outlet, not a power strip or extension cord.
- Not a surge protector, battery, generator or meter device.
60-Day Money-Back Guarantee
Test StopWatt for a full billing cycle. Return it within 60 days of delivery for a refund of the purchase price.
Issued by the official StopWatt store · Refund of the purchase price
Frequently asked questions
Does it work on 240V circuits?
Is it safe to leave plugged in continuously?
Keep reading on the official StopWatt site
- About the official StopWatt store
- Is StopWatt a scam, or is it legit?
- Does StopWatt lower your electric bill?
- Buy StopWatt from the official store
- StopWatt and Amazon: what buyers should know
Ready to order? Buy StopWatt direct or compare StopWatt bundle pricing.
Order direct from the official store
Ready to try StopWatt risk-free?
Pick the bundle that matches your home size, then complete your order securely on this page — no redirects, no account required.
Sizing rule of thumb: one device per 800–1,200 sq ft, so most homes over 1,500 sq ft use the 3-device bundle.
Checkout — 3 Devices
$105.84
%20--%3e%3csvg%20xmlns:dc='http://purl.org/dc/elements/1.1/'%20xmlns:cc='http://creativecommons.org/ns%23'%20xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns%23'%20xmlns:svg='http://www.w3.org/2000/svg'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:sodipodi='http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'%20xmlns:inkscape='http://www.inkscape.org/namespaces/inkscape'%20version='1.1'%20id='Layer_1'%20x='0px'%20y='0px'%20width='1000.046'%20height='323.65302'%20viewBox='0%200%201000.046%20323.653'%20enable-background='new%200%200%20258.381%20161.154'%20xml:space='preserve'%20inkscape:version='0.91%20r13725'%20sodipodi:docname='Visa_2006.svg'%3e%3cmetadata%20id='metadata23'%3e%3crdf:RDF%3e%3ccc:Work%20rdf:about=''%3e%3cdc:format%3eimage/svg+xml%3c/dc:format%3e%3cdc:type%20rdf:resource='http://purl.org/dc/dcmitype/StillImage'%20/%3e%3cdc:title%3e%3c/dc:title%3e%3c/cc:Work%3e%3c/rdf:RDF%3e%3c/metadata%3e%3cdefs%20id='defs21'%3e%3c/defs%3e%3csodipodi:namedview%20pagecolor='%23ffffff'%20bordercolor='%23666666'%20borderopacity='1'%20objecttolerance='10'%20gridtolerance='10'%20guidetolerance='10'%20inkscape:pageopacity='0'%20inkscape:pageshadow='2'%20inkscape:window-width='1366'%20inkscape:window-height='705'%20id='namedview19'%20showgrid='false'%20inkscape:zoom='0.35355339'%20inkscape:cx='34.690897'%20inkscape:cy='131.15483'%20inkscape:window-x='-8'%20inkscape:window-y='-8'%20inkscape:window-maximized='1'%20inkscape:current-layer='Layer_1'%20/%3e%3cg%20id='g4158'%20transform='matrix(4.4299631,0,0,4.4299631,-81.165783,-105.04783)'%3e%3cpolygon%20points='116.145,95.719%2097.858,95.719%20109.296,24.995%20127.582,24.995%20'%20id='polygon9'%20style='fill:%2300579f'%20/%3e%3cpath%20d='m%20182.437,26.724%20c%20-3.607,-1.431%20-9.328,-3.011%20-16.402,-3.011%20-18.059,0%20-30.776,9.63%20-30.854,23.398%20-0.15,10.158%209.105,15.8%2016.027,19.187%207.075,3.461%209.48,5.72%209.48,8.805%20-0.072,4.738%20-5.717,6.922%20-10.982,6.922%20-7.301,0%20-11.213,-1.126%20-17.158,-3.762%20l%20-2.408,-1.13%20-2.559,15.876%20c%204.289,1.954%2012.191,3.688%2020.395,3.764%2019.188,0%2031.68,-9.481%2031.828,-24.153%200.073,-8.051%20-4.814,-14.22%20-15.35,-19.261%20-6.396,-3.236%20-10.313,-5.418%20-10.313,-8.729%200.075,-3.01%203.313,-6.093%2010.533,-6.093%205.945,-0.151%2010.313,1.278%2013.622,2.708%20l%201.654,0.751%202.487,-15.272%200,0%20z'%20id='path11'%20inkscape:connector-curvature='0'%20style='fill:%2300579f'%20/%3e%3cpath%20d='m%20206.742,70.664%20c%201.506,-4.063%207.301,-19.788%207.301,-19.788%20-0.076,0.151%201.503,-4.138%202.406,-6.771%20l%201.278,6.094%20c%200,0%203.463,16.929%204.215,20.465%20-2.858,0%20-11.588,0%20-15.2,0%20l%200,0%20z%20m%2022.573,-45.669%20-14.145,0%20c%20-4.362,0%20-7.676,1.278%20-9.558,5.868%20l%20-27.163,64.855%2019.188,0%20c%200,0%203.159,-8.729%203.838,-10.609%202.105,0%2020.771,0%2023.479,0%200.525,2.483%202.182,10.609%202.182,10.609%20l%2016.932,0%20-14.753,-70.723%200,0%20z'%20id='path13'%20inkscape:connector-curvature='0'%20style='fill:%2300579f'%20/%3e%3cpath%20d='M%2082.584,24.995%2064.675,73.222%2062.718,63.441%20C%2059.407,52.155%2049.023,39.893%2037.435,33.796%20l%2016.404,61.848%2019.338,0%2028.744,-70.649%20-19.337,0%200,0%20z'%20id='path15'%20inkscape:connector-curvature='0'%20style='fill:%2300579f'%20/%3e%3cpath%20d='m%2048.045,24.995%20-29.422,0%20-0.301,1.429%20c%2022.951,5.869%2038.151,20.016%2044.396,37.02%20L%2056.322,30.94%20c%20-1.053,-4.517%20-4.289,-5.796%20-8.277,-5.945%20l%200,0%20z'%20id='path17'%20inkscape:connector-curvature='0'%20style='fill:%23faa61a'%20/%3e%3c/g%3e%3c/svg%3e)
%20--%3e%3csvg%20version='1.1'%20id='svg3409'%20inkscape:version='0.91%20r13725'%20sodipodi:docname='MasterCard%202016.svg'%20xmlns:cc='http://creativecommons.org/ns%23'%20xmlns:dc='http://purl.org/dc/elements/1.1/'%20xmlns:inkscape='http://www.inkscape.org/namespaces/inkscape'%20xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns%23'%20xmlns:sodipodi='http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'%20xmlns:svg='http://www.w3.org/2000/svg'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20width='999.2px'%20height='776px'%20viewBox='0%200%20999.2%20776'%20enable-background='new%200%200%20999.2%20776'%20xml:space='preserve'%3e%3cpath%20id='XMLID_1775_'%20inkscape:connector-curvature='0'%20d='M181.1,774.3v-51.5c0-19.7-12-32.6-32.6-32.6%20c-10.3,0-21.5,3.4-29.2,14.6c-6-9.4-14.6-14.6-27.5-14.6c-8.6,0-17.2,2.6-24,12v-10.3h-18v82.4h18v-45.5c0-14.6,7.7-21.5,19.7-21.5%20s18,7.7,18,21.5v45.5h18v-45.5c0-14.6,8.6-21.5,19.7-21.5c12,0,18,7.7,18,21.5v45.5H181.1z%20M448.1,691.9h-29.2V667h-18v24.9h-16.3%20v16.3h16.3v37.8c0,18.9,7.7,30,28.3,30c7.7,0,16.3-2.6,22.3-6l-5.2-15.5c-5.2,3.4-11.2,4.3-15.5,4.3c-8.6,0-12-5.2-12-13.7v-36.9%20h29.2V691.9z%20M600.9,690.1c-10.3,0-17.2,5.2-21.5,12v-10.3h-18v82.4h18v-46.4c0-13.7,6-21.5,17.2-21.5c3.4,0,7.7,0.9,11.2,1.7%20l5.2-17.2C609.4,690.1,604.3,690.1,600.9,690.1L600.9,690.1z%20M370,698.7c-8.6-6-20.6-8.6-33.5-8.6c-20.6,0-34.3,10.3-34.3,26.6%20c0,13.7,10.3,21.5,28.3,24l8.6,0.9c9.4,1.7,14.6,4.3,14.6,8.6c0,6-6.9,10.3-18.9,10.3c-12,0-21.5-4.3-27.5-8.6l-8.6,13.7%20c9.4,6.9,22.3,10.3,35.2,10.3c24,0,37.8-11.2,37.8-26.6c0-14.6-11.2-22.3-28.3-24.9l-8.6-0.9c-7.7-0.9-13.7-2.6-13.7-7.7%20c0-6,6-9.4,15.5-9.4c10.3,0,20.6,4.3,25.8,6.9L370,698.7L370,698.7z%20M848.9,690.1c-10.3,0-17.2,5.2-21.5,12v-10.3h-18v82.4h18v-46.4%20c0-13.7,6-21.5,17.2-21.5c3.4,0,7.7,0.9,11.2,1.7L861,691C857.5,690.1,852.4,690.1,848.9,690.1L848.9,690.1z%20M618.9,733.1%20c0,24.9,17.2,42.9,43.8,42.9c12,0,20.6-2.6,29.2-9.4l-8.6-14.6c-6.9,5.2-13.7,7.7-21.5,7.7c-14.6,0-24.9-10.3-24.9-26.6%20c0-15.5,10.3-25.8,24.9-26.6c7.7,0,14.6,2.6,21.5,7.7l8.6-14.6c-8.6-6.9-17.2-9.4-29.2-9.4C636.1,690.1,618.9,708.2,618.9,733.1%20L618.9,733.1L618.9,733.1z%20M785.4,733.1v-41.2h-18v10.3c-6-7.7-14.6-12-25.8-12c-23.2,0-41.2,18-41.2,42.9c0,24.9,18,42.9,41.2,42.9%20c12,0,20.6-4.3,25.8-12v10.3h18V733.1L785.4,733.1z%20M719.3,733.1c0-14.6,9.4-26.6,24.9-26.6c14.6,0,24.9,11.2,24.9,26.6%20c0,14.6-10.3,26.6-24.9,26.6C728.8,758.8,719.3,747.6,719.3,733.1L719.3,733.1z%20M503.9,690.1c-24,0-41.2,17.2-41.2,42.9%20c0,25.8,17.2,42.9,42.1,42.9c12,0,24-3.4,33.5-11.2l-8.6-12.9c-6.9,5.2-15.5,8.6-24,8.6c-11.2,0-22.3-5.2-24.9-19.7h60.9%20c0-2.6,0-4.3,0-6.9C542.5,707.3,527,690.1,503.9,690.1L503.9,690.1L503.9,690.1z%20M503.9,705.6c11.2,0,18.9,6.9,20.6,19.7h-42.9%20C483.3,714.2,491,705.6,503.9,705.6L503.9,705.6z%20M951.1,733.1v-73.8h-18v42.9c-6-7.7-14.6-12-25.8-12c-23.2,0-41.2,18-41.2,42.9%20c0,24.9,18,42.9,41.2,42.9c12,0,20.6-4.3,25.8-12v10.3h18V733.1L951.1,733.1z%20M885,733.1c0-14.6,9.4-26.6,24.9-26.6%20c14.6,0,24.9,11.2,24.9,26.6c0,14.6-10.3,26.6-24.9,26.6C894.4,758.8,885,747.6,885,733.1L885,733.1z%20M282.4,733.1v-41.2h-18v10.3%20c-6-7.7-14.6-12-25.8-12c-23.2,0-41.2,18-41.2,42.9c0,24.9,18,42.9,41.2,42.9c12,0,20.6-4.3,25.8-12v10.3h18V733.1L282.4,733.1z%20M215.5,733.1c0-14.6,9.4-26.6,24.9-26.6c14.6,0,24.9,11.2,24.9,26.6c0,14.6-10.3,26.6-24.9,26.6%20C224.9,758.8,215.5,747.6,215.5,733.1z'/%3e%3cg%3e%3crect%20id='rect19'%20x='364'%20y='66.1'%20fill='%23FF5A00'%20width='270.4'%20height='485.8'/%3e%3cpath%20id='XMLID_330_'%20inkscape:connector-curvature='0'%20fill='%23EB001B'%20d='M382,309c0-98.7,46.4-186.3,117.6-242.9%20C447.2,24.9,381.1,0,309,0C138.2,0,0,138.2,0,309s138.2,309,309,309c72.1,0,138.2-24.9,190.6-66.1C428.3,496.1,382,407.7,382,309z'%20/%3e%3cpath%20id='path22'%20inkscape:connector-curvature='0'%20fill='%23F79E1B'%20d='M999.2,309c0,170.8-138.2,309-309,309%20c-72.1,0-138.2-24.9-190.6-66.1c72.1-56.7,117.6-144.2,117.6-242.9S570.8,122.7,499.6,66.1C551.9,24.9,618,0,690.1,0%20C861,0,999.2,139.1,999.2,309z'/%3e%3c/g%3e%3c/svg%3e)
%20--%3e%3csvg%20version='1.1'%20baseProfile='tiny'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20512%20210.2'%20xml:space='preserve'%3e%3cpath%20id='XMLID_34_'%20d='M93.6,27.1C87.6,34.2,78,39.8,68.4,39c-1.2-9.6,3.5-19.8,9-26.1c6-7.3,16.5-12.5,25-12.9%20C103.4,10,99.5,19.8,93.6,27.1%20M102.3,40.9c-13.9-0.8-25.8,7.9-32.4,7.9c-6.7,0-16.8-7.5-27.8-7.3c-14.3,0.2-27.6,8.3-34.9,21.2%20c-15,25.8-3.9,64,10.6,85c7.1,10.4,15.6,21.8,26.8,21.4c10.6-0.4,14.8-6.9,27.6-6.9c12.9,0,16.6,6.9,27.8,6.7%20c11.6-0.2,18.9-10.4,26-20.8c8.1-11.8,11.4-23.3,11.6-23.9c-0.2-0.2-22.4-8.7-22.6-34.3c-0.2-21.4,17.5-31.6,18.3-32.2%20C123.3,42.9,107.7,41.3,102.3,40.9%20M182.6,11.9v155.9h24.2v-53.3h33.5c30.6,0,52.1-21,52.1-51.4c0-30.4-21.1-51.2-51.3-51.2H182.6z%20M206.8,32.3h27.9c21,0,33,11.2,33,30.9c0,19.7-12,31-33.1,31h-27.8V32.3z%20M336.6,169c15.2,0,29.3-7.7,35.7-19.9h0.5v18.7h22.4V90.2%20c0-22.5-18-37-45.7-37c-25.7,0-44.7,14.7-45.4,34.9h21.8c1.8-9.6,10.7-15.9,22.9-15.9c14.8,0,23.1,6.9,23.1,19.6v8.6l-30.2,1.8%20c-28.1,1.7-43.3,13.2-43.3,33.2C298.4,155.6,314.1,169,336.6,169z%20M343.1,150.5c-12.9,0-21.1-6.2-21.1-15.7c0-9.8,7.9-15.5,23-16.4%20l26.9-1.7v8.8C371.9,140.1,359.5,150.5,343.1,150.5z%20M425.1,210.2c23.6,0,34.7-9,44.4-36.3L512,54.7h-24.6l-28.5,92.1h-0.5%20l-28.5-92.1h-25.3l41,113.5l-2.2,6.9c-3.7,11.7-9.7,16.2-20.4,16.2c-1.9,0-5.6-0.2-7.1-0.4v18.7C417.3,210,423.3,210.2,425.1,210.2z%20'/%3e%3cg%3e%3c/g%3e%3cg%3e%3c/g%3e%3cg%3e%3c/g%3e%3cg%3e%3c/g%3e%3cg%3e%3c/g%3e%3cg%3e%3c/g%3e%3c/svg%3e)
Encrypted- Charged onceOne-time payment, no subscription
- Dispatch1–2 business days, tracked
- 60 daysReturn for a refund, no questions
- Real supportsupport@getstopwatt.net
Prices in USD. The bundle price shown is the full discount — there is no code to hunt for. Add-ons available only here: add 1 extra stopwatt and 3-year replacement protection.