--- product_id: 538771062 title: "RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies" brand: "ruzizao" price: "4 zł" currency: PLN in_stock: false reviews_count: 8 url: https://www.desertcart.pl/products/538771062-ruzizao-dc-power-supply-variable-120v-3a-adjustable-switching-regulated store_origin: PL region: Poland --- # 120V, 3A adjustable output 4-digit high-res LED display Multi-layer safety protections RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies **Brand:** ruzizao **Price:** 4 zł **Availability:** ❌ Out of Stock ## Summary > ⚡ Power your projects with precision and style — never settle for less! ## Quick Answers - **What is this?** RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies by ruzizao - **How much does it cost?** 4 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/538771062-ruzizao-dc-power-supply-variable-120v-3a-adjustable-switching-regulated) ## Best For - ruzizao enthusiasts ## Why This Product - Trusted ruzizao brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal-Clear Display:** Backlit 4-digit LED ensures you never miss a detail, even in dimly lit labs or late-night projects. - • **Precision Power Control:** Achieve ultra-accurate voltage (0.01V) and current (0.001A) adjustments for flawless testing and development. - • **Portable Lab-Grade Design:** Compact (24x8.5x15.5 cm), lightweight (1.2 kg) with shock-absorbing feet—perfect for on-the-go professionals and makers. - • **Smart Auto Mode Switching:** Seamlessly toggles between constant voltage and constant current modes to protect your devices and optimize performance. - • **Integrated USB Power & Cooling:** Charge your devices via 5V/2A USB port while the intelligent cooling fan keeps your power supply whisper-quiet and cool under pressure. ## Overview The RUZIZAO DC Power Supply is a high-precision, adjustable 120V/3A bench power supply featuring a sharp 4-digit LED display, automatic constant voltage/current mode switching, and comprehensive safety protections. Its compact, lightweight design with shock-absorbing feet makes it ideal for lab, DIY, and professional use. Additional perks include a 5V/2A USB charging port and an intelligent cooling fan for quiet, reliable operation. ## Description Full description not available ## Features - High Precision, Low Ripple, LED Display, Auto Switch C.C/C.V Mode: RUZIZAO DC power supply is a professional power supply regulator with high accuracy of 0.01V and 0.001A, low ripple of DC bench power supply. The backlit 4-digits LED display has the advantage of high resolution, which can be easily viewed even if you are in low-light conditions . Adjustable power supply has C.V/C.C indicator, constant voltage and constant current mode can automatically complete the switch. - CE & FCC Certification, Multiple Protection, Various Application: Lab bench power supply have passed CE & FCC Certification. DC power supply has multiple protections: overvoltage protection, overcurrent protection, overheating protection, over power protection, short circuit protection, leakage protection. DC power supply is suitable for LiFePO4 battery charging, arduino project, laboratories, schools, electronic maintenance , electrolysis, electroplating, lamp test, aging test, DIY, etc. - Stable Vertical Design, Lightweight and Portable: Bench power supply adopts stable vertical design, DC power supply has shock absorber rubber feet at the bottom, so it will be safer and more stable during use. DC power supply is very light and portable, with a size of only 24 x 8.5 x 15.5 cm and a weight of only 1.2 kg. You can easily take the DC power supply to work. - 5V/2A USB Port, Intelligent Cooling Fan, High-quality Materials: The DC bench power supply is equipped with a 5V/2A USB port, you can charge your mobile phone, tablet or other devices. When the working temperature of the DC power supply exceeds 122℉/50℃, the cooling fan is turned on intelligently, which can effectively dissipate heat. , Reduce working noise and prolong the service life of equipment. High-quality materials make our DC power supply more durable. - Quality Check and Terms of Service: You will get DC bench Power Supply*1, Output Power Cord*1, Input Power Cord*1, User Manual*1 by purchasing DC power supply. We will inspect all DC power supply and accessories before shipment to ensure that the quality of the products received by each customer is good. If you have any questions about our DC power supply, please contact us, we will response back within 24 hours. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | RUZIZAO | | Package Dimensions | 31.6 x 20.7 x 13 cm; 1.77 kg | | Manufacturer reference | SPS Parent | | Manufacturer | RUZIZAO | | Item Weight | 1.77 kg | | Guaranteed software updates until | unknown | ## Product Details - **Brand:** RUZIZAO - **Colour:** Black - **Material:** Metal - **Connector type:** USB - **Input voltage:** 2.3E+2 Volts ## Images ![RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies - Image 1](https://m.media-amazon.com/images/I/71NDaiHBp0L.jpg) ![RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies - Image 2](https://m.media-amazon.com/images/I/71p1jNfDp4L.jpg) ![RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies - Image 3](https://m.media-amazon.com/images/I/61kQdo6-PlL.jpg) ![RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies - Image 4](https://m.media-amazon.com/images/I/615H0LqkZ6L.jpg) ![RUZIZAO DC Power Supply Variable: 120V 3A Adjustable Switching Regulated High Precision 4-Digits LED Display 5V/2A USB Port Test Lead Output & Input Power Cord Bench Lab Power Supplies - Image 5](https://m.media-amazon.com/images/I/71Kexv15IBL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ this works well *by J***A on 10 September 2024* Wasn't sure about this as it was one of the cheaper ones, however it has performed perfectly since I had it. The outputs are accurate and easy to tune. ### ⭐⭐⭐⭐⭐ Superb PSU *by A***8 on 1 April 2024* This is great as a psu and as a battery charger for the batteries for my mobility scooter and for my electronics hobby. Great protection built in with a wide range of dc voltages and current limiting. The price put this professional utility into my budget range too. ### ⭐⭐⭐⭐ Good if you don't actually need fine control *by A***D on 4 July 2024* Yup, this certainly is a variable power supply, and it does indeed supply power, so that's good.My main issue is with those controls. First, you can only turn the dials so far. That means if you're trying to finely adjust the voltage, but you're at the limits of the "fine" dial, you need to switch to the coarse dial, push it with that (definitely overshooting your target), and readjust with fine the other way.That would be just a mild annoyance if not for the second issue; the "resolution" of the two dials doesn't match up. There are "dead spots" where from one coarse setting the minimum fine setting is too high, and from the next, the max fine setting is too low. Want that setting? Be prepared to tweak both dials again and again and hope to get lucky.To be honest, it feels like money was spent in the wrong places. While I daresay someone had use for a USB port on their PSU, I doubt most people do, and why have a grounding port if you're not going to include a cable to connect it to anything? Save the cash on those, put in controls that give better control over the ouput; that's the main function, after all.This could be much, much worse. I don't regret buying it, for my purposes. But if I had the chance to choose again, I'd splash out slightly more for one with a keypad for entering values rather than dials. --- ## 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.pl/products/538771062-ruzizao-dc-power-supply-variable-120v-3a-adjustable-switching-regulated](https://www.desertcart.pl/products/538771062-ruzizao-dc-power-supply-variable-120v-3a-adjustable-switching-regulated) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*