# Uninterruptible Power Supply ONLINE USV-Systeme YUNTO Smile 400 Line-Interactive 0.4 kVA 240 W 2 AC outlets 12 V 4.5 Ah LCD Tower

**URL:** https://aio.lv/en/product--online-usv-systeme-ys400--4405788
**Data updated:** 2026-03-07 14:45 (EET)
**Category:** UPS
**Manufacturer:** ONLINE USV-Systeme
**Manufacturer code:** YS400
**EAN:** 4026908004311
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 190.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 157.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--online-usv-systeme-ys400--4405788

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

ONLINE USV-Systeme YUNTO Smile 400 is a Line-Interactive uninterruptible power supply (UPS) with 0.4 kVA (240 W) output capacity. It provides 2 AC outlets, a 12 V / 4.5 Ah battery and typical backup time of about 7 minutes at half load. Tower form factor with LCD display, compact footprint (101 × 300 × 142 mm) and 3.7 kg weight for protecting small servers, network devices and workstations.

## Long description

ONLINE USV-Systeme YUNTO Smile 400 is a Line-Interactive uninterruptible power supply (UPS) designed for protecting small servers, network devices and workstations. With 0.4 kVA (240 W) output capacity, two AC outlets and an integrated 12 V / 4.5 Ah battery, the Smile 400 provides short-term backup power and automatic voltage regulation to keep connected equipment running during power disturbances. The unit comes in a compact tower form factor with an LCD that shows operational status and basic measurements. Its footprint of 101 × 300 × 142 mm and 3.7 kg weight make it suitable for space-constrained environments where reliable, simple UPS protection is required.
Advantages
The Line-Interactive topology provides automatic voltage regulation and surge protection while delivering uninterrupted power during short outages. The built-in LCD offers clear, at-a-glance information about battery status, load and input/output conditions. Compact tower design and modest weight allow for flexible placement on or under desks and in small racks. Two AC outlets support basic device redundancy without additional power strips, and the integrated 12 V / 4.5 Ah battery delivers a typical backup time of about 7 minutes at half load, sufficient for orderly shutdowns or bridging to a generator.
Suitable for
 Small office servers and NAS devices
 Network switches, routers and VoIP gateways
 Workstations, point-of-sale terminals and small PCs
 Home lab equipment and media devices requiring short-term backup
Key specifications
 Output power capacity: 0.4 kVA
 Output power: 240 W
 AC outlets: 2
 Battery: 12 V / 4.5 Ah (internal)
 Backup time: approximately 7 minutes at 50% load
 Form factor: tower
 Display: LCD status panel
 Dimensions (W×D×H): 101 × 300 × 142 mm
 Weight: 3.7 kg
 Colour: black
How to use
Place the UPS on a stable, flat surface in a ventilated area, leaving clearance for airflow around the enclosure. Connect the UPS input to a grounded mains outlet and switch the unit on using the front panel controls. Plug critical equipment into the two supplied AC outlets. Monitor the LCD for input voltage, load level and battery status. In the event of mains failure, the UPS will automatically supply battery power to connected devices; use the provided runtime to save work and perform an orderly shutdown or transfer to a secondary power source.
Usage recommendations
For reliable operation, perform an initial battery charge cycle for at least 8–12 hours after first installation. Periodically test the UPS by simulating a power failure and verify that connected devices remain powered and shut down properly. Replace the internal battery according to the manufacturer's recommended interval or when runtime drops significantly. Avoid placing the UPS in direct sunlight or close to heat sources, and ensure load does not exceed the rated 240 W output.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| AC outlets quantity | 2 AC outlet(s) |
| USB port | Yes |

### Battery

| Feature | Value |
|---|---|
| Number of batteries supported | 1 |
| Battery recharge time | 6 h |
| Typical backup time at half load | 7 min |
| Battery voltage | 12 V |
| Battery capacity | 4.5 Ah |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Form factor | Tower |
| Display type | LCD |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 3.7 kg |
| Height | 142 mm |
| Width | 101 mm |
| Depth | 300 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 90 |
| Storage temperature (T-T) | 15 - 50 |
| Operating temperature (T-T) | 0 - 40 |
| Storage relative humidity (H-H) | 0 - 90 |

### Features

| Feature | Value |
|---|---|
| Audible alarm(s) | Yes |
| Output power capacity | 0.4 kVA |
| Noise level | 40 dB |
| Output power | 240 W |
| Input operation voltage (max) | 290 V |
| Input operation voltage (min) | 162 V |
| Output operation voltage (min) | 207 V |
| Output operation voltage (max) | 253 V |
| UPS topology | Line-Interactive |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 85078000 |

## FAQ

### How much does the UPS ONLINE USV-Systeme YUNTO Smile 400 cost, and is it available for purchase?

The price is 190.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can UPS ONLINE USV-Systeme YUNTO Smile 400 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ONLINE USV-Systeme products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ONLINE USV-Systeme service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ac outlets quantity, weight, output power, output power capacity, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/4405788/54803302_large.webp