---
product_id: 70589447
title: "RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver)"
brand: "siemens"
price: "₩274850"
currency: KRW
in_stock: true
reviews_count: 8
url: https://www.desertcart.kr/products/70589447-rdj100rf-set-room-thermostat-radio-frequency-set-with-24-hour
store_origin: KR
region: South Korea
---

# 24-hour programmable timer RF wireless control Precision temp knob ±0.25°C RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver)

**Brand:** siemens
**Price:** ₩274850
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of the chill with Siemens’ smart thermostat magic! 📡

## Quick Answers

- **What is this?** RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver) by siemens
- **How much does it cost?** ₩274850 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/70589447-rdj100rf-set-room-thermostat-radio-frequency-set-with-24-hour)

## Best For

- siemens enthusiasts

## Why This Product

- Trusted siemens brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless RF Connectivity:** Enjoy hassle-free wireless control with robust radio frequency technology—no messy wires, just smart comfort.
- • **Precision Temperature Control:** Fine-tune your environment with a large, intuitive volume-style knob offering ±0.25°C accuracy for ultimate comfort.
- • **24-Hour Programmable Scheduler:** Tailor your heating to your lifestyle with a full-day timer that adapts to your daily rhythm effortlessly.
- • **Energy-Smart Freeze Protection:** Protect your home from freezing temperatures automatically, saving energy and preventing costly damage.
- • **User-Friendly German Engineering:** Experience a sleek, human-centric design that’s as easy to use as your favorite gadget—engineered for perfection.

## Overview

The Siemens RDJ100RF/SET is a wall-mounted, programmable room thermostat featuring wireless RF connectivity and a 24-hour time switch. Designed with precision German engineering, it offers easy-to-use controls including a large rotary knob for fine temperature adjustments within ±0.25°C. The set includes a transmitter and receiver, supports automatic HVAC control, and comes with energy-saving freeze protection. Powered by 2 AA batteries and boasting a clear LCD backlight display, it’s a reliable, stylish upgrade for modern smart homes.

## Description

SIEMENS RDJ100RF/SET DIGITAL (RF) DAILY DIGITAL PROGRAMMABLE ROOM THERMOSTAT + RECEIVER

Review: Well engineered and conceived - Now, this is a well engineered device. Yes, it is made in China, but it is definitely conceived by Germans (I am an engineer myself, and it has been awhile since I held a device so human-friendly and so well made). Really easy to use. You can: make it follow "day" (usually higher) temperature constantly; make it follow "night" (usually lower) temperature constantly; dance in between them according to time schedule; make it follow arbitrary temperature by rotating big volume-like knob; make it protect your house from freezing - all of it with a simple slider selector and a large knob you can rotate like a volume knob on the amplifier. No problems with wireless connection. You can also adjust how it follows temperature - Fast/Slow PID, +/- 0.5 and +/- 0.25 degrees. I went for +/- 0.5 degrees, since I hate when boiler turns on and off 100 times per hour - it is really bad for it. Default setting is Slow PID, which would be OK for most folks. The only thing I didn't like is that I had to bend connecting wires at 90 degrees very close to the case of the thermostat when I installed the wired part of it on the wall. My wires were single-core (old house, rented), and they weren't too happy about a bend so sharp. Otherwise, definitely recommend - well made and easy to use. Works flawlessly.
Review: Thermostat - Bought this thermostat ti replace broken one very easy to set up and it linked up with old receiver straight away brilliant product

## Features

- Siemens - RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079HVLVZ3 |
| Backlight | Yes |
| Best Sellers Rank | 27,832 in DIY & Tools ( See Top 100 in DIY & Tools ) 37 in Home Programmable Thermostats |
| Brand | SIEMENS |
| Brand Name | SIEMENS |
| Colour | White |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | RF |
| Control Method | Touch |
| Control Type | Button Control |
| Controller Type | Push Button |
| Controller type | Push Button |
| Customer Reviews | 4.5 out of 5 stars 141 Reviews |
| Display Type | LCD |
| Included Components | Transmitter, Receiver (other components may be included but are not explicitly mentioned) |
| Item Shape | Rectangular |
| Item Type Name | RDJ100RF |
| Item Weight | 0.34 Kilograms |
| Manufacturer | Siemens |
| Manufacturer Warranty Description | 12 months. |
| Model Name | RDJ100RF |
| Model Number | S55770-T380 |
| Model name | RDJ100RF |
| Mounting Type | Wall Mount |
| Number of Batteries | 2 AA batteries required. (included) |
| Power Source | Wireless |
| Product Style | programmable |
| Special Features | Programmable |
| Special feature | Programmable |
| Specific Uses For Product | Control of heating, ventilation and air conditioning (HVAC) systems |
| Specific uses for product | Control of heating, ventilation and air conditioning (HVAC) systems |
| Temperature Control Type | Automatic |
| Voltage | 230 Volts |

## Product Details

- **Brand:** SIEMENS
- **Colour:** White
- **Connectivity technology:** RF
- **Controller type:** Push Button
- **Included components:** Transmitter, Receiver (other components may be included but are not explicitly mentioned)
- **Model name:** RDJ100RF
- **Power source:** Wireless
- **Special feature:** Programmable
- **Specific uses for product:** Control of heating, ventilation and air conditioning (HVAC) systems
- **Temperature Control Type:** Automatic

## Images

![RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver) - Image 1](https://m.media-amazon.com/images/I/51sS6+IQdQL.jpg)

## Questions & Answers

**Q: The tech details states no batteries required, is this correct**
A: Batteries are required for the thermostat.

**Q: Does the time change automatically when the clocks change?**
A: I changed mine,I don't think.it changes automatically.

**Q: My control box is broken,if i buy this will it sync with the current reciever box i already have installed or will it all have to be replaced?**
A: No it will not sync with your current reciver but the unit is supplyed with a reciver unit which will require connecting to your bolier.

**Q: How sensitive is the thermostat**
A: Yes it is quite sensitive

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well engineered and conceived
*by Y***I on 15 November 2025*

Now, this is a well engineered device. Yes, it is made in China, but it is definitely conceived by Germans (I am an engineer myself, and it has been awhile since I held a device so human-friendly and so well made). Really easy to use. You can: make it follow "day" (usually higher) temperature constantly; make it follow "night" (usually lower) temperature constantly; dance in between them according to time schedule; make it follow arbitrary temperature by rotating big volume-like knob; make it protect your house from freezing - all of it with a simple slider selector and a large knob you can rotate like a volume knob on the amplifier. No problems with wireless connection. You can also adjust how it follows temperature - Fast/Slow PID, +/- 0.5 and +/- 0.25 degrees. I went for +/- 0.5 degrees, since I hate when boiler turns on and off 100 times per hour - it is really bad for it. Default setting is Slow PID, which would be OK for most folks. The only thing I didn't like is that I had to bend connecting wires at 90 degrees very close to the case of the thermostat when I installed the wired part of it on the wall. My wires were single-core (old house, rented), and they weren't too happy about a bend so sharp. Otherwise, definitely recommend - well made and easy to use. Works flawlessly.

### ⭐⭐⭐⭐⭐ Thermostat
*by S***N on 7 November 2025*

Bought this thermostat ti replace broken one very easy to set up and it linked up with old receiver straight away brilliant product

### ⭐⭐⭐⭐ seimens thermostat
*by M***Y on 6 October 2025*

works great! i managed to pair this to the older model ( RDJ10RF) receiver without issue!! No need for a tradesman..

## Frequently Bought Together

- Siemens - RDJ100RF/SET - Room Thermostat Radio Frequency Set with 24-Hour time Switch (Transmitter and Receiver)
- Siemens RDH100 Digital Thermostat
- Siemens RDJ100 Programmable Thermostat

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-05*