# Indoor Outdoor Thermometer Hygrometer TFA-Dostmann Horizon Black

**URL:** https://aio.lv/en/product--tfa-dostmann-35115501--7690999
**Data updated:** 2025-12-30 06:10 (EET)
**Category:** Weather Station
**Manufacturer:** tfa dostmann
**Manufacturer code:** 35.1155.01
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 26.85 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tfa-dostmann-35115501--7690999

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

The TFA-Dostmann Horizon Black is a versatile indoor and outdoor thermometer and hygrometer. It features wireless connectivity, measuring temperature and humidity trends. Powered by AAA/AA batteries, it has a sleek design with dimensions of 158 mm width, 26 mm depth, and 123 mm height. Ideal for monitoring your environment effectively.

## Long description

The TFA-Dostmann Horizon Black is a radio-controlled indoor/outdoor thermometer and hygrometer that displays current indoor climate, outdoor conditions and short-term weather forecasts. It includes an electronic barometer that shows air pressure and a 12-hour pressure history bar chart, a wireless outdoor temperature transmitter (with support for up to two additional transmitters), radio-controlled time and date via DCF77, alarm clock functions with two wake-up alarms and snooze, blue backlight, moon phase and sunrise/sunset times. The device is compact and battery powered, with a black finish suitable for home monitoring.
Advantages
The Horizon provides combined temperature and humidity monitoring for inside and outside areas, a built-in electronic barometer for forecast indications and a 12-hour pressure history to help interpret weather changes. Wireless transmission allows monitoring of remote locations (one transmitter included, two additional optional), while DCF77 time synchronization ensures accurate clock and calendar display. Dual alarms with snooze and a one-button blue backlight add everyday convenience.
Suitable for
Home indoor climate monitoring (living rooms, bedrooms)
Outdoor temperature monitoring (garden, balcony)
Monitoring additional areas such as basements or garages using extra transmitters
Users who need accurate radio-controlled time and simple alarm functions
Key specifications
Brand: tfa dostmann
Model: Horizon Black (MPN 35.1155.01)
Functions: indoor/outdoor temperature and humidity, barometer, moon phase, sunrise/sunset, clock, dual alarm with snooze
Temperature range (indoor): 0 to 50 °C
Temperature range (outdoor): -20 to 60 °C
Built-in display: Yes
Power: AAA/AA batteries (battery type as specified by manufacturer)
Dimensions (W×D×H): 158 × 26 × 123 mm
Weight: 0.224 kg
Colour: Black
How to use
Place the main unit indoors on a stable surface or mount it according to the manufacturer’s instructions. Install batteries in the main unit and in the outdoor transmitter, then pair the transmitter(s) with the station following the pairing procedure in the manual. The station receives the DCF77 signal to set time and date automatically; position the unit where reception is reliable. Use the display and buttons to view temperature, humidity, barometric trend and alarm settings. Press the backlight button to illuminate the display.
Usage recommendations
Position the outdoor transmitter in a shaded, sheltered location out of direct sunlight and heavy precipitation to ensure accurate readings; avoid placing the indoor unit near heat sources or drafts for reliable indoor climate measurements.

## Specifications

### Display

| Feature | Value |
|---|---|
| Backlight display | Yes |
| Built-in display | Yes |

### Packaging data

| Feature | Value |
|---|---|
| Battery included | No |
| Outdoor sensor | Yes |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wireless |
| Transmission frequency | 433 GHz |

### Features

| Feature | Value |
|---|---|
| Product colour | Black |
| Snooze function | Yes |
| Alarm clock | Yes |
| Housing material | Plastic |
| Temperature measurement range (inside) (T-T) | 0 - 50 |
| Temperature measurement range (inside) (T-T) | 32 - 122 |
| Temperature measurement range (outside) (T-T) | -20 - 60 |
| Temperature measurement range (outside) (T-T) | -4 - 140 |
| Number of sensors supported (max) | 3 |
| Min/Max temperature memory | Yes |
| Alarm function | Yes |
| Clock function | Yes |
| Clock/Date display | Yes |
| Measuring functions | Indoor hygrometer, Indoor thermometer, Outdoor thermometer |
| Outdoor sensors range | 60 m |
| Moon phase | Yes |
| Sunrise/sunset time | Yes |
| Measuring functions trend display | Hygrometer, Thermometer |
| Humidity measuring range (inside) (H-H) | 20 - 95 |

### Power

| Feature | Value |
|---|---|
| Battery type | AAA/AA |
| Power source | Battery |
| Battery voltage | 1.5 V |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.224 kg |
| Height | 123 mm |
| Width | 158 mm |
| Depth | 26 mm |

## FAQ

### How much does the Indoor Outdoor Thermometer TFA-Dostmann Horizon Black cost, and is it available for purchase?

The price is 32.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 43 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 30.06.2026 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 tfa dostmann 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 tfa dostmann 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: built-in display, temperature measurement range (inside) (t-t), temperature measurement range (outside) (t-t), alarm function, weight, clock function, 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.

### Where can I download the instructions for Indoor Outdoor Thermometer TFA-Dostmann Horizon Black?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/7690999/65634165_large.webp