---
product_id: 647724302
title: "Bluetooth Room Thermometer Hygrometer, ITH-21-B Digital Temperature Humidity Meter with APP Control, Data Export for Home, Office, Wine Cellar, Greenhouse"
brand: "inkbird"
price: "£23.92"
currency: GBP
in_stock: true
reviews_count: 13
category: "Inkbird"
url: https://www.desertcart.co.uk/products/647724302-bluetooth-room-thermometer-hygrometer-ith-21-b-digital-temperature-humidity
store_origin: GB
region: United Kingdom
---

# 300 days offline data storage Bluetooth 5.0 app control 15+ months battery life Bluetooth Room Thermometer Hygrometer, ITH-21-B Digital Temperature Humidity Meter with APP Control, Data Export for Home, Office, Wine Cellar, Greenhouse

**Brand:** inkbird
**Price:** £23.92
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay ahead of your environment with smart precision and effortless control!

## Quick Answers

- **What is this?** Bluetooth Room Thermometer Hygrometer, ITH-21-B Digital Temperature Humidity Meter with APP Control, Data Export for Home, Office, Wine Cellar, Greenhouse by inkbird
- **How much does it cost?** £23.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/647724302-bluetooth-room-thermometer-hygrometer-ith-21-b-digital-temperature-humidity)

## Best For

- inkbird enthusiasts

## Why This Product

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

## Key Features

- • **Long-Lasting Power:** Powered by 2 included AA batteries, delivering over 15 months of uninterrupted climate tracking.
- • **Data-Driven Comfort:** Store up to 300 days of offline data and export 2 years of historical records for deep climate insights.
- • **Precision Swiss Sensors:** Accurate readings from -20°C to 60°C and 0% to 99% RH with ±0.2°C precision for ultimate reliability.
- • **Seamless Smart Monitoring:** Control and track temperature & humidity remotely via Bluetooth 5.0 app within 230ft range.
- • **Versatile & Stylish Design:** Compact 3.8-inch LCD display with easy-to-read comfort indicators, perfect for home, office, wine cellar, or greenhouse.

## Overview

The Inkbird ITH-21-B is a Bluetooth-enabled digital thermometer and hygrometer featuring Swiss-made sensors for precise temperature (-20°C to 60°C) and humidity (0-99% RH) monitoring. It offers a bright 3.8-inch LCD with comfort indicators, app control with a 230ft range, 300 days of offline data storage, and data export capabilities. Powered by 2 AA batteries (included), it runs for over 15 months, making it ideal for diverse indoor environments like homes, offices, wine cellars, and greenhouses.

## Description

Inkbird Bluetooth Room Thermometer Hygrometer, ITH-21-B Digital Temperature Humidity Meter with APP Control, Data Export for Home, Office, Wine Cellar, Greenhouse : desertcart.co.uk: Garden

Review: Great little device. accurate, easy to use, and versatile! - Neat compact and modern looking. The display is clear and easy to read, showing both temperature and humidity at a quick glance. Setup was quick, and the Bluetooth connection to the app works well. I can monitor conditions and even export data if I want to track changes over seems spot on compared to my other devices. The ability to place it anywhere and still get app feedback makes it a great smart home upgrade. Highly recommend for anyone who needs to monitor indoor climate whether it’s for comfort, plant care, or wine storage.
Review: Good quality Hygrometers ! - I use these for the room that I keep all my tarantulas and a few geckos in. I've tried a few over the years, but I genuinely like these. Comes as a twin pack, and seems a fair price compared to othere on the market. Seem to work well, and after comparing alongside some of my others, they seem to be fairly accurate. Easy to setup .. just take off the rear cover and pull out the small plastic strip at the battery. (4x batteries are included). Love the fact they use AAA batteries, unlike some others that use awkward sized button cell batteries which aren't always readily available. App setup is quick and easy via the "Inkbird" app on your usual app store, and love the fact it can be used/controlled/ configured on the same app as some of my other Inkbird products. Firmware update was quick and easy, as can be seen in my video, and app configuration is almost instant to change a multitude of settings. Comes packed with a LOT of features for such a small unit, including previous data tracking, hi/low range setting, alarms when you exceed these ranges, etc. Temperature can be changed instantly via the button at the top, to change from c to f, so you can switch between them quickly. Units can be shelf/table mounted via the small pull out stand on the rear, and sit very stable. Can also be wall mounted with a screw, due to the hanging cut out on the rear panel. Overall, another great product from Inkbird, and genuinely happy to reccomend these to anyone.

## Features

- All-in-One Digital Thermometer: This digital thermometer and hygrometer features a bright 3.8-inch LCD screen for easy reading. It offers TH mode (temperature and humidity) and time mode to suit different needs. With 3 comfort indicators, it clearly displays temperature and humidity levels, helping you monitor your room climate effortlessly
- Accurate detection: Equipped with Swiss-made sensors, this room thermometer ensures stable and reliable performance. It accurately measures temperatures from -20°C to 60°C and humidity levels from 0% RH to 99% RH. Trust its precision for consistent and dependable readings in any indoor environment
- APP Control: Using advanced Bluetooth 5.0 technology, this thermometer connects to the INKBIRD app for remote monitoring. Control and track temperature and humidity changes within a range of 70m/230ft. Customize comfort ranges in the app to create a healthy and safe living environment tailored to your needs
- Historical storage and export: This hygrometer thermometer stores up to 300 days of offline data and allows you to export up to 2 years of historical records to your computer via the app
- Wide Application: Powered by 2*AA batteries (included), this indoor thermometer and hygrometer operates for over 15 months. Its versatile design makes it suitable for various spaces, including bedrooms, offices, wine cellars, greenhouses, and garages

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D66BH9V9 |
| Batteries | 2 AA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | 29,381 in Garden ( See Top 100 in Garden ) 194 in Hygrometers |
| Customer Reviews | 4.4 4.4 out of 5 stars (418) |
| Date First Available | 5 Jun. 2024 |
| Included components | 1*ITH-21-B; 2*AA batteries; 1*user manual |
| Item Package Quantity | 1 |
| Item Weight | 170 g |
| Item model number | ITH-21-B |
| Manufacturer | Inkbird |
| Measurement Accuracy | ±0.2℃(±0.36°F) |
| Part number | ITH-21-B |
| Plug profile | Tabletop |
| Power source type | Battery Powered |
| Product Dimensions | 9.7 x 9.7 x 6.5 cm; 170 g |
| Size | ITH-21-B |
| Voltage | 3 Volts (DC) |
| tech_spec_battery_description_toys | 2 AA batteries |

## Product Details

- **Battery description:** 2 AA batteries
- **Brand:** Inkbird
- **Item weight:** 0.17 Kilograms
- **Mounting type:** Tabletop
- **Upper temperature rating:** 60 Degrees Celsius

## Images

![Bluetooth Room Thermometer Hygrometer, ITH-21-B Digital Temperature Humidity Meter with APP Control, Data Export for Home, Office, Wine Cellar, Greenhouse - Image 1](https://m.media-amazon.com/images/I/61TU0khXB4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little device. accurate, easy to use, and versatile!
*by J***S on 28 September 2025*

Neat compact and modern looking. The display is clear and easy to read, showing both temperature and humidity at a quick glance. Setup was quick, and the Bluetooth connection to the app works well. I can monitor conditions and even export data if I want to track changes over seems spot on compared to my other devices. The ability to place it anywhere and still get app feedback makes it a great smart home upgrade. Highly recommend for anyone who needs to monitor indoor climate whether it’s for comfort, plant care, or wine storage.

### ⭐⭐⭐⭐⭐ Good quality Hygrometers !
*by K***M on 2 November 2024*

I use these for the room that I keep all my tarantulas and a few geckos in. I've tried a few over the years, but I genuinely like these. Comes as a twin pack, and seems a fair price compared to othere on the market. Seem to work well, and after comparing alongside some of my others, they seem to be fairly accurate. Easy to setup .. just take off the rear cover and pull out the small plastic strip at the battery. (4x batteries are included). Love the fact they use AAA batteries, unlike some others that use awkward sized button cell batteries which aren't always readily available. App setup is quick and easy via the "Inkbird" app on your usual app store, and love the fact it can be used/controlled/ configured on the same app as some of my other Inkbird products. Firmware update was quick and easy, as can be seen in my video, and app configuration is almost instant to change a multitude of settings. Comes packed with a LOT of features for such a small unit, including previous data tracking, hi/low range setting, alarms when you exceed these ranges, etc. Temperature can be changed instantly via the button at the top, to change from c to f, so you can switch between them quickly. Units can be shelf/table mounted via the small pull out stand on the rear, and sit very stable. Can also be wall mounted with a screw, due to the hanging cut out on the rear panel. Overall, another great product from Inkbird, and genuinely happy to reccomend these to anyone.

### ⭐⭐⭐⭐⭐ Amazing little device!
*by K***V on 25 October 2024*

This is a great product, exactly what I was looking for, I have set one up in my greenhouse and hot tub area. I have set alerts for low temperatures so I can have an early warning of risk of frost!. These are tiny as you can see from the photos, but the screen is easy to read. Set up was a breeze, very easy and worked straight away, as batteries are pre-installed. The Bluetooth range is great. Obviously, different phones will give different ranges, but this one reaches my green house just fine!

## Frequently Bought Together

- INKBIRD Bluetooth Smart Thermo-Hygrometer ITH-21-B Indoor Thermometer and Hygrometer 6-in-1 Temperature and Humidity Monitor with APP Control Custom Comfort Levels 2 Years History Export
- Boveda Portable Travel 2-Way Humidity Resealable Bag – Waterproof & Dustproof - Preloaded with 69% RH Pack - Patented Technology - Large Storage For 60-80 Items – 1 Count
- Boveda 65% Two-Way Humidity Control Pack For Aging & Long-Term Storage in Large Plastic & Wood Boxes – Size 320 – Single – Moisture Absorber – Humidifier Pack – Individually Wrapped Hydration Packet

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-18*