# Smart home light controller Synergy21 S21-LED-SR000042 — 12 W, 12–36 V, 20 A, 868.3 MHz, indoor, white

**URL:** https://aio.lv/en/product--synergy21-s21-led-sr000042--12099754
**Data updated:** 2026-03-20 09:52 (EET)
**Category:** Home Automation
**Manufacturer:** Synergy21
**Manufacturer code:** S21-LED-SR000042
**EAN:** 4038816034793
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 60.49 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 49.99 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--synergy21-s21-led-sr000042--12099754

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Synergy21 S21-LED-SR000042 is a smart home light controller in white designed for indoor use. It operates at 868.3 MHz and supports a connected load of 12 W. The controller accepts 12–36 V input voltage with up to 20 A input current. Suitable for integrating LED lighting into a home automation system to control and automate indoor lighting circuits.

## Long description

Synergy21 S21-LED-SR000042 is a compact indoor smart home light controller in white designed for integration with wireless home automation systems. The device operates at 868.3 MHz and accepts an input voltage range of 12–36 V with up to 20 A current handling. Rated for a connected load of 12 W, the controller provides stable control output for LED luminaires and is suitable for automating indoor lighting circuits in residential and light-commercial environments.
Advantages
The controller combines a small footprint and straightforward installation with support for common low-voltage LED systems. Operating at 868.3 MHz ensures compatibility with wireless home automation networks that use this frequency band. The wide input voltage range (12–36 V) and high current capability (up to 20 A) give flexibility for different LED power supplies and configurations while maintaining reliable LED operation. Its white enclosure is suited for discreet installation in indoor electrical cabinets or lighting control enclosures.
Suitable for
 Automating indoor LED lighting in homes and apartments
 Integration with wireless 868.3 MHz home automation systems and hubs
 Control of low-voltage LED strips and fixtures with 12–36 V supplies
 Retrofit projects where a compact indoor controller is required
Key specifications
 Rated power handling: 12 W connected load
 Input voltage range: 12–36 V DC
 Maximum input current: up to 20 A
 Operating frequency: 868.3 MHz for wireless communication
 Installation environment: indoor use, white enclosure
How to use
Mount the controller inside a suitable indoor electrical cabinet or lighting control enclosure following local electrical regulations. Connect the low-voltage supply (12–36 V) to the input terminals and wire the LED loads to the controller outputs, ensuring total current does not exceed the specified 20 A. Pair or integrate the controller with the home automation hub or receiver operating at 868.3 MHz according to the system instructions. Configure control parameters, scenes or schedules through the compatible hub or app to enable automated switching and dimming of connected LED luminaires. Verify each circuit during commissioning and make adjustments to dimming levels and timing as needed.
Usage recommendations
Install in a dry, ventilated indoor location and avoid exposure to direct moisture. Use supply wiring and protection devices sized for the maximum current rating and follow manufacturer and local electrical code guidance. For reliable wireless performance, ensure line-of-sight or minimal interference between the controller and the 868.3 MHz hub, and update controller firmware or hub software when compatible updates are available.

## Specifications

| Feature | Value |
|---|---|
| Input voltage | 12-36 |
| Product colour | White |
| Operating frequency | 868.3 |
| Connected load | 12 W |
| Input current | 20 |
| Placement supported | Indoor |
| Easy to install | Yes |
| International Protection (IP) code | IP20 |
| Transmission distance | 15 m |

## FAQ

### How much does the Synergy21 S21-LED-SR000042 smart light controller cost, and is it available for purchase?

The price is 60.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 17 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 20.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Synergy21 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 Synergy21 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

## Image

https://aio.lv/img/cache/product/12099754/67638761_large.webp