# Built-in Dimmer Synergy21 S21-LED-SR000044 — White, Button Control, 3 V DC, 868.3 MHz, 15 m range

**URL:** https://aio.lv/en/product--synergy21-s21-led-sr000044--12100227
**Data updated:** 2026-03-20 09:52 (EET)
**Category:** Smart Switches
**Manufacturer:** Synergy21
**Manufacturer code:** S21-LED-SR000044
**EAN:** 4038816034953
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.99 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 26.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--synergy21-s21-led-sr000044--12100227

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 21.07.2026 | free |
| Pickup points | 24.07.2026 | 1.89 EUR |
| Courier delivery to door | 24.07.2026 | 4.99 EUR |

## Summary description

Synergy21 S21-LED-SR000044 is a built-in dimmer designed for indoor lighting control. It features button control, white housing, 3 V DC input and RF communication at 868.3 MHz with a maximum indoor range of 15 m. Weighing 100 g, the module is suitable for integrating into wall switches or junction boxes to dim LED lighting and adjust ambiance in residential or commercial spaces.

## Long description

Synergy21 S21-LED-SR000044 is a built-in dimmer module for indoor LED lighting control. Housed in white and operated via a button control, the unit accepts 3 V DC and communicates wirelessly at 868.3 MHz with a typical indoor range up to 15 m. Weighing 100 g, the compact module is designed for integration into wall switch locations or junction boxes to provide on/off switching and smooth brightness adjustment for compatible LED fittings.
Advantages
The device provides flicker-free dimming and stable performance when used with explicitly dimmable LED drivers and lamps. Button control offers a straightforward user interface for everyday operation, while the small form factor enables installation in standard single-gang switch boxes or similar recessed mounting points. RF communication at 868.3 MHz supports remote integration or pairing with compatible systems where wireless control is required.
Suitable for
 Residential rooms where LED lighting requires dimming and simple wall-mounted control
 Small commercial spaces and offices needing local manual dimming and wireless control capability
 Retrofit projects replacing standard switches with LED-compatible dimming modules
 Junction box installations where a compact built-in dimmer is preferred
Key specifications
 Control type: button control for on/off and dimming
 Power input: 3 V DC
 Wireless communication: 868.3 MHz RF with up to 15 m indoor range (typical)
 Color / housing: white
 Weight: 100 g
 Mounting: built-in for wall switches or junction boxes, compact form factor
How to use
Turn off mains power before installation and follow local electrical codes. Mount the module in a compatible wall switch location or junction box, and make electrical connections according to the luminaire and dimmer wiring diagrams. After restoring power, use the button control to switch the connected LED lighting on and off and to adjust brightness. If integrating with a wireless system, follow the manufacturer’s pairing procedure to register the device on the RF network at 868.3 MHz.
Usage recommendations
Use only with LED luminaires and drivers explicitly specified as dimmable and compatible with the dimming method supported by this module. Verify that the driver or lamp manufacturer permits the applied control technique and confirm adequate load range to avoid unstable behaviour. For wireless integration, ensure line-of-sight or minimal obstruction within the stated indoor range for reliable communication; when in doubt, consult a qualified electrician or the luminaire manufacturer.

## Specifications

| Feature | Value |
|---|---|
| Type | Dimmer |
| Weight | 0.1 kg |
| Operating temperature (T-T) | -10 - 60 |
| Product colour | White |
| Case design | Built-in |
| Control type | Buttons |
| RF transmission frequency | 868.3 MHz |
| International Protection (IP) code | IP20 |
| DC input voltage | 3 |
| Maximum indoor range | 15 m |

## FAQ

### How much does the Synergy 21 S21-LED-SR000044 dimmers S21-LED-SR000044 cost, and is it available for purchase?

The price is 31.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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 21.07.2026 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/12100227/67638535_large.webp