--- product_id: 581290392 title: "3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty]" brand: "goldsource" price: "₨225304" currency: LKR in_stock: false reviews_count: 5 category: "Goldsource" url: https://www.desertcart.lk/products/581290392-3000w-st-pro-auto-step-up-and-step-down-voltage store_origin: LK region: Sri Lanka --- # 3000W max load power 4 versatile AC outlets + USB port 3-year warranty & CE certified 3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] **Brand:** goldsource **Price:** ₨225304 **Availability:** ❌ Out of Stock ## Summary > ⚡ Power up globally, stress down locally! ## Quick Answers - **What is this?** 3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] by goldsource - **How much does it cost?** ₨225304 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/581290392-3000w-st-pro-auto-step-up-and-step-down-voltage) ## Best For - goldsource enthusiasts ## Why This Product - Trusted goldsource brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Soft-Start:** Built-in easy start function prevents circuit breaker trips and protects your home’s electrical system. - • **Peace of Mind Warranty:** Backed by a 3-year limited warranty and hassle-free replacement policy for ultimate reliability. - • **Powerhouse Performance:** Handles up to 3000W for heavy-duty appliances without breaking a sweat. - • **Universal Compatibility:** Four AC outlets including US, Universal, and Schuko plugs plus a 5V USB port for all your devices. - • **Seamless Voltage Conversion:** Auto step-up and step-down from 110V to 220V (and vice versa) with stable output for 50/60Hz devices. ## Overview The Goldsource ST-Pro 3000W Voltage Transformer Converter is a heavy-duty, CE-certified device designed for seamless step-up and step-down voltage conversion between 110V and 220V. Featuring a 3000W maximum load capacity, four versatile AC outlets (US, Universal, Schuko), and a 5V USB port, it supports simultaneous use of multiple devices. Its smart soft-start technology prevents circuit breaker trips, ensuring safe operation. With a robust 3-year warranty, this transformer is ideal for professionals and travelers needing reliable, high-capacity voltage conversion. ## Description HIGH VOLTAGE CONVERSION TECHNOLOGY This up and down voltage transformer converter has automatic voltage conversion technology which makes it safer and easier use, it can detect the input voltage and convert to the corresponding you need. We have designed this transformer converter with the latest high-level voltage transformer which can be used perfectly well in your home. It will convert from 220-240 volt to 110-120 volt AND from 110-120 volt to 220-240 volt 50 60 Hz, The Universal 220v Output Socket will accept all types of plugs except the Big South African plug. Provided 100% FULL Load Capacity. This premium and high functioning transformer converter features a heavy-duty power cord with a standard US 3-prong plug, this ST-PRO-3000 has a total of 4 AC outputs, two designated for 110V with US standard outlets, the other two for 220V, one with a universal outlet, the other with a German/Schuko outlet, plus a 5V standard USB port, a unique feature of the ST-PRO series and 1st in the industry. And most importantly, all three outputs can be used simultaneously and continuously. What are you waiting for? Click add to cart and get this portable and highly effective up and down transformer converter now! PS：The onside socket's color is random（black or White). Review: Product arrived quick. I've used the step up transformer for about 3 hours and it definitely works as advertised. Good simple instructions come with the unit. I don't have a way to test it for how many watts it puts out at this time. Would definitely recommend to this point. Review: Needed a step-up/down converter for a ps5 I bought in the UK (back in US now) this one was highly rated and it works like a charm. Great value, definitely be sure to give yourself wiggle room with wattage, went with 1000w but will never even come close to half that, I heard it helps with longevity though. ## Features - ★EASY START FUNCTION: This premium and highly functional transformer converter has a soft-start circuit is built inside to prevent an inrush current at the starting moment. Home circuit breaker not trip off at the starting moment. It comes with four input voltages selectable: 110V/200V/220V/240V. - ★HIGHLY FUNCTIONAL CONVERTER: This CE Certified step-up and step-down AC voltage transformer has the ability to convert from 110V up to 220V or from 200/220/240V down to 110V. (Please note a voltage converter does NOT change the frequency, in another word, what goes in is what comes out, either 50 Hz or 60Hz) - ★BEST EFFECTIVE TRANFORMER CONVERTER: Unlike other converters, we have designed this one with 3,000 watts Maximum Load Capacity (MLC), most suitable and cost-effective for devices such as rice cookers, hot water pots, household food mixers, blenders with the Maximum Power Consumption (MPC) between 1050 and 2250 watts. - ★QUALITY STABLE OUTPUT CONSUMPTION: This voltage transformer has 100% loading capacity. It has 4 AC outlets including two 110V US standard, one 220V Universal and one German/French Schuko plus one DC 5V USB which makes it work perfectly well. - ★100% SATISFACTION GUARANTEED: As a brand, we believe in quality not quantity! We give instant full refund and free replacement if the product have any problems for using. All our 3000W auto step up and down voltage transformer converter are made to fully work at its best for your comfort & satisfaction. It is certified & we offer you 3-year manufacturer’s limited warranty. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KGMK47S | | Best Sellers Rank | #116,609 in Electronics ( See Top 100 in Electronics ) #1,253 in International Power Adapters | | Item model number | ST-Pro 3000W | | Manufacturer | Goldsource | | Product Dimensions | 27.94 x 22.86 x 17.78 cm; 5.38 kg | ## Product Details - **Brand:** Goldsource - **Manufacturer:** Goldsource - **Specification met:** CE ## Images ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 1](https://m.media-amazon.com/images/I/61oyq4ePV0L.jpg) ## Questions & Answers **Q: Will this unit convert a single phase 240v generator output (center tap ground) to 120v?** A: Yes **Q: Will it be safe for a 120v. 550w appliance ?** A: The 1000W transformer is likely fine, but note that some devices (like laser printers) draw a lot of power when they first start up (sometimes 2 or 3 times listed power draw( and you need to allow for that. **Q: where can I purchase fuses for the transformer?** A: Very giid **Q: will this work on 1750w air fryer?** A: It should be work. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***S on 19 September 2025* Product arrived quick. I've used the step up transformer for about 3 hours and it definitely works as advertised. Good simple instructions come with the unit. I don't have a way to test it for how many watts it puts out at this time. Would definitely recommend to this point. ### ⭐⭐⭐⭐⭐ Review *by C***R on 6 July 2024* Needed a step-up/down converter for a ps5 I bought in the UK (back in US now) this one was highly rated and it works like a charm. Great value, definitely be sure to give yourself wiggle room with wattage, went with 1000w but will never even come close to half that, I heard it helps with longevity though. ### ⭐⭐⭐⭐⭐ Review *by B***K on 7 November 2020* Bought it for my appliance from China, Worked like a charm. Very well designed and made, plug feels solid, no odd smell or noise. Highly recommended. ## Frequently Bought Together - Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Yinleader 1500W Step Up & Step Down Voltage Transformer Converter 110V to 220V or 220V/230V/240V to 110V/120V Power Converter w/US Power Cord,Circuit Breaker Protection --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.lk/products/581290392-3000w-st-pro-auto-step-up-and-step-down-voltage](https://www.desertcart.lk/products/581290392-3000w-st-pro-auto-step-up-and-step-down-voltage) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-04-26*