---
product_id: 577476455
title: "RAT Thunder Calling 1.81\" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green"
brand: "rat"
price: "NT$1933"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/577476455-rat-thunder-calling-1-81-hd-display-h90-smartwatch-bt
store_origin: TW
region: Taiwan
---

# IP67 Water Resistant Heart Rate Monitor 1.81" HD Display RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green

**Brand:** rat
**Price:** NT$1933
**Availability:** ✅ In Stock

## Summary

> 📈 Elevate Your Everyday with the RAT Thunder Calling!

## Quick Answers

- **What is this?** RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green by rat
- **How much does it cost?** NT$1933 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/577476455-rat-thunder-calling-1-81-hd-display-h90-smartwatch-bt)

## Best For

- rat enthusiasts

## Why This Product

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

## Key Features

- • **Stay Connected:** Bluetooth 5.1 for seamless calling and notifications.
- • **Multi-Sport Ready:** 8 workout modes to keep you active and engaged.
- • **Health at a Glance:** Track heart rate and SpO2 for peace of mind.
- • **Built for Adventure:** IP67 water resistance means you can take it anywhere.
- • **Customize Your Style:** DIY Watch Face Studio for a personal touch!

## Overview

The RAT Thunder Calling Smartwatch features a vibrant 1.81" HD display, advanced Bluetooth 5.1 for seamless connectivity, and comprehensive health tracking capabilities including heart rate and blood oxygen monitoring. With customizable watch faces, multi-sport modes, and IP67 water resistance, this smartwatch is designed for both style and functionality, making it the perfect companion for the modern professional.

## Description

The "RAT Thunder Calling 1.81" HD Display H90 Smartwatch" appears to be a smartwatch with several features designed for both men and women. The watch is equipped with various health-related functions, such as heart rate monitoring and blood oxygen (SpO2) monitoring.Features:App Name : H Band LiteScreen Detail: 1.81" TFT Square ScreenResolution: 240*280Strap Material: Silicone+Stainless Steel HookOverall, this smartwatch seems to offer a range of features commonly found in modern smartwatches. It's suitable for those who want to track their health, stay connected, and possibly use it as a fitness companion.

## Features

- [DIY Watch Face Studio] Customize watch faces as per your own needs. Choose, backgrounds, themes & widgets!
- [Bluetooth] Advanced Bluetooth 4.0/5.1 calling offers a quicker, stronger, and better connection so you can dial seamlessly. Microphone: Yes
- [Health Functions] The watch is equipped with various health-related functions, such as heart rate monitoring and blood oxygen (SpO2) monitoring. These features can help you keep track of your health and well-being.
- [Compatible Language] English, Simplified Chinese, traditional Chinese, Korean, German, Japanese, Russian, Spanish, Italian, French, Vietnamese, Portuguese, Persian, Polish, Turkish, Czech, Slovak, hungary, Arabia.
- [Features] Voice Assistant, Recording, Inbuilt Games, IP67 Water Resistant, Accelerometer, Alarm Clock, Battery - 230 mAh, 3-5 Days Regular Use, 7-10 Days Stand By, Bluetooth - 5.0, Gesture Control, SPO2, Heart Rate, Breathe & Sleep Monitoring, Steps Tracking. Pedometer, Calorie, Distance & Activity Tracker, Bluetooth Calling, Add Contacts, Dialpad, Local Music Storage, Connect to Earpods, Inbuilt Mic & Speakers, 8 Workout Modes, Smart Notifications, Music & Camera Control, Time Display.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | RAT |
| Manufacturer | Innovative Marketing |
| Model | Thunder-Calling-Smartwatch-Green |
| Model Name | Thunder-Calling-Smartwatch-Green |
| Product Dimensions | 4.55 x 3.75 x 1.16 cm; 100 g |
| Item model number | Thunder-Calling-Smartwatch-Green |
| Memory Storage Capacity | 128 MB |
| Ram Memory Installed Size | 640 KB |
| Operating System | android |
| Resolution | 240 x 240 |
| Compatible Devices | Smartphone |
| Special Features | Gesture Control, Activity Tracker, Oxymeter (SpO2), Heart Rate Monitor |
| Mounting Hardware | User Manual, Magnetic Charger, Warranty Card, Smartwatch |
| Number of items | 1 |
| Display Technology | LCD |
| Standing screen display size | 1.81 Inches |
| Display Type | LCD |
| Wattage | 120 Watts |
| Battery Average Life | 5 Days |
| Battery Capacity | 230 Milliamp Hours |
| Wireless Type | Bluetooth |
| Connector Type | Bluetooth |
| Device interface - primary | Microphone |
| Manufacturer | Innovative Marketing |
| Country of Origin | India |
| Item Weight | 100 g |

## Product Details

- **Operating System:** android
- **Memory Storage Capacity:** 128 MB
- **Special Feature:** Gesture Control, Activity Tracker, Oxymeter (SpO2), Heart Rate Monitor
- **Battery Capacity:** 230 Milliamp Hours
- **Connectivity Technology:** Bluetooth

## Images

![RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green - Image 1](https://m.media-amazon.com/images/I/71m3fILQ9tL.jpg)
![RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green - Image 2](https://m.media-amazon.com/images/I/61s+M51RN7L.jpg)
![RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green - Image 3](https://m.media-amazon.com/images/I/510x7gVdaBL.jpg)
![RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green - Image 4](https://m.media-amazon.com/images/I/71t4rP1z-DL.jpg)
![RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green - Image 5](https://m.media-amazon.com/images/I/61lgAWEkyWL.jpg)

## Frequently Bought Together

- RAT Thunder Calling 1.81" HD Display H90 Smartwatch with BT Calling | Multi-Sport Mode| HeartRate & Blood Oxygen Tracking | Games & Calculator with SPO2 and Sleep Monitoring for Men & Women - Green
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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-31*