--- product_id: 1595390 title: "SF500 500W 110v/220v 220v/110v Step Up/Down Automatic Transformer Adapter" brand: "seven star" price: "HK$860" currency: HKD in_stock: true category: "Seven Star" url: https://www.desertcart.hk/products/1595390-sf500-500w-110v-220v-220v-110v-step-up-down-automatic store_origin: HK region: Hong Kong --- # 500W power capacity Universal input/output voltage LED output voltage indicator SF500 500W 110v/220v 220v/110v Step Up/Down Automatic Transformer Adapter **Brand:** seven star **Price:** HK$860 **Availability:** βœ… In Stock ## Summary > 🌐 Power up anywhere, anytime β€” don’t let voltage hold you back! ## Quick Answers - **What is this?** SF500 500W 110v/220v 220v/110v Step Up/Down Automatic Transformer Adapter by seven star - **How much does it cost?** HK$860 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/1595390-sf500-500w-110v-220v-220v-110v-step-up-down-automatic) ## Best For - seven star enthusiasts ## Why This Product - Trusted seven star brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact & Portable:** Lightweight 16 oz design fits perfectly in your travel or home setup. - β€’ **Plug & Play Anywhere:** Universal socket accepts most global plug typesβ€”no adapters needed. - β€’ **Stay Safe, Stay Smart:** Built-in thermal fuse with reset button ensures reliable protection without hassle. - β€’ **Instant Voltage Feedback:** LED indicator shows output voltage status so you’re always in control. - β€’ **Power Your Global Adventures:** Seamlessly converts 110V to 220V and vice versa for all your international devices. ## Overview The Seven Star SF500 is a versatile 500W automatic step-up/step-down voltage converter designed for global use. It supports dual input voltages (110V/220V) and outputs the corresponding voltage automatically, featuring a universal socket compatible with most plug types worldwide. Equipped with a thermal fuse and reset button for safety, plus an LED output voltage indicator, this compact and portable transformer ensures your devices stay powered and protected wherever you go. ## Description Brand New Foreign Electricity Automatic AC Power Converter. Use it with appliances up to 500W. Step Up & Down Transformer 500 Watts 50/60 Hz Foreign Electricity Power Converter TECHNICAL SPECIFICATION: INPUT : AC 110v / 220V 50/60 Hz OUTPUT : AC 220v / 110V 50/60Hz High capacity shock proof socket. Lead wire to connect wall socket . Universal Socket Outlet. Thermal Protection. AC Input Plug 5 Amp. 2-Round Pin. Heavy Duty Transformer for safety and reliability. Universal output receptacles (will accept European 2 round pin plug, North America 2 flat pin and 3 prong plug). Reset Button. Safety breaker. Dimensions: 6"L x 3.25"W x 3"H ## Features - This is a 500 watts converter for portable use. If the product is using higher or close to 500 watts it needs a higher power voltage converter. - Convert 110/117/120V AC to 220/230/240V AC OR 220/230/240V AC to 110/117/120V AC - Output Voltage LED Indicator, No need to set the input voltage - connect to any outlet in the world - Universal Output Socket - Accept most plug types from around the world. - Thermal Fuse Protection with Reset Button (No need to replace fuses) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001TPZ294 | | Best Sellers Rank | #640,263 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,941 in Power Converters | | Brand Name | Seven Star | | Current Rating | 5 A | | Customer Reviews | 4.1 4.1 out of 5 stars (815) | | Global Trade Identification Number | 07699813300792 | | Included Components | 500 Watt Step Up / Down Voltage Converter Transformer, Adapter, Warranty | | Item Weight | 16 ounces | | Manufacturer | Seven Star | | Maximum Frequency | 60 hertz | | Minimum Frequency | 50 hertz | | Model | SF500 | | Mounting Type | Remote Mounting | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | SF500 | | Power Source | Corded Electric | | Specification Met | No | | Unit Count | 1 Count | ## Product Details - **Brand:** Seven Star - **Current Rating:** 5 A - **Mounting Type:** Remote Mounting - **Power Source:** Corded Electric - **Specification Met:** No ## Images ![SF500 500W 110v/220v 220v/110v Step Up/Down Automatic Transformer Adapter - Image 1](https://m.media-amazon.com/images/I/819vqvcE4KL.jpg) ## Questions & Answers **Q: Is it safe to plug a US power strip into this and use it in China as long as no voltage over 500?** A: I would say it would be safe. The thing that worries me is your assumption about the voltage. I think it is rated at 500watts and not 500volts. If you had three devices and together they consumed less than 500w, any power strip will serve to provide extra sockets to connect your devices to the transformer. Just beware the overall power to all the connected devices should not exceed 500w. I would cut it out at about 400w max. You can't load equipment to full power output and not have it heat up. Just not safe. Once again this my opinion. Please use your discretion. **Q: will this work for kitchen aid 325 v in Poland?** A: Agnieszka did you get this transformer? Does it work fine for the mixer? I m looking to buy it for the same thing 0 Kitchen aid I need to send to Poland. let me know please. **Q: weight of the item** A: I have one and just put it on the scale: 1764 grams. **Q: can i use this in Australia?** A: Bought the 500 model and it worked perfect in New Zealand,also i purchased a power strip with usb charging port on it. My girlfriend used her curling iron and blow drier with no issues. ## Frequently Bought Together - Seven Star SF500 500W 110v/220v 220v/110v Step Up/Down Automatic Transformer Adapter - QVS PC3PX-15 3-Outlet, 3-Prong Power Extension Cord - Mackie DLM8 2000W 8-Inch Powered Loudspeaker --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/1595390-sf500-500w-110v-220v-220v-110v-step-up-down-automatic](https://www.desertcart.hk/products/1595390-sf500-500w-110v-220v-220v-110v-step-up-down-automatic) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-10-17*