---
product_id: 120745182
title: "MRT Transponder, Works with mylaps RC3 RC4 Through V4.4 System for RC car Racing."
brand: "stormer hobbies"
price: "A$184"
currency: AUD
in_stock: true
reviews_count: 8
category: "Stormer Hobbies"
url: https://www.desertcart.com.au/products/120745182-mrt-transponder-works-with-mylaps-rc3-rc4-through-v4-4
store_origin: AU
region: Australia
---

# Compact 19x16x6mm size Dual stored ID numbers Ultra-light 4g weight MRT Transponder, Works with mylaps RC3 RC4 Through V4.4 System for RC car Racing.

**Brand:** stormer hobbies
**Price:** A$184
**Availability:** ✅ In Stock

## Summary

> 🏁 Race Ready, Pro Approved: The MRT Transponder that keeps you winning.

## Quick Answers

- **What is this?** MRT Transponder, Works with mylaps RC3 RC4 Through V4.4 System for RC car Racing. by stormer hobbies
- **How much does it cost?** A$184 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/120745182-mrt-transponder-works-with-mylaps-rc3-rc4-through-v4-4)

## Best For

- stormer hobbies enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Pros:** Stormer team’s go-to transponder—join the ranks of serious racers who demand reliability and precision.
- • **Dual-ID Flexibility:** Switch between two factory-set ID numbers for ultimate race-day adaptability and hassle-free setup.
- • **Waterproof Durability:** 100% waterproof design means your transponder keeps pace rain or shine—no compromises on race day.
- • **Featherlight & Compact:** At just 4 grams and ultra-small dimensions, it fits effortlessly into even the tightest RC car chassis.
- • **Seamless Compatibility:** Works flawlessly with AMBrc2, AMBrc3, and RC4 systems up to v4.4—stay ahead without the v4.5 hassle.

## Overview

The MRT Transponder is a lightweight, compact, and waterproof RC car transponder compatible with AMBrc2, AMBrc3, and RC4 systems up to version 4.4. Featuring dual stored ID numbers for flexible race configurations, it is trusted by professional teams like Stormer and designed to fit seamlessly into all major RC car brands. Its reliable LED status indicator and broad voltage range ensure consistent performance across diverse racing environments.

## Description

Perfect with all AMBrc systems and RC4 up to v4.4 (will not work with the v4.5 Drone System update). The Stormer team use the MRT transponders ourselves. So you know they're good! Pop them in all your favorite cars. Associated, Xray, Losi, CRC, Serpent, you name it! MRT Transponder, mPTX-ID 100% waterproof These transponders from MRT are lightweight and small in size. This makes them easy to fit into the smallest, tightest areas. Size: 19 x 16 x 6mm Weight: 4 grams The PTX ID number of each transponder can be changed to an alternative ID number. Each individually numbered transponder has its 'custom' ID number written on the supplied instruction sheet with the an alternative number also available. PTX transponders are supplied with 2 stored ID numbers and come factory set on the custom ID. It is possible to switch from the custom number to the other number if required. To use the PTX it should be connected to a power socket on a receiver or to a battery pack. The LED will light up to show the transponder is operating. When setting the number (or checking the number that is set) the LED will flash to show the number selected, or the number that has been set. Operating Voltage: 2.1V - 16V DC Lead Length: about 190mm from Stormer Hobbies Mounting: Standard 3 Hole (same as AMB/MyLaps) Compatibility: AMBrc2, AMBrc3 and RC4 systems.

Review: Works like a charm! - Works great at both my outdoor track and local indoor clay racing track. Obviously you want to check with your track owners to assure compatibility with whatever lap tracking system and version they are using. But this seems to cover the most versions and main stream option for most tracks. No issues in my 5 race days.
Review: Best rc transponder - Works perfectly at our track

## Features

- Perfect with all AMBrc systems and RC4 up to v4.4 (will not work with the v4.5 Drone System update).
- Size: 19 x 16 x 6mm
- Weight: 4 grams
- PTX transponders are supplied with 2 stored ID numbers and come factory set on the custom ID. It is possible to switch from the custom number to the other number if required.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q1WDMMD |
| Best Sellers Rank | #66,288 in Toys & Games ( See Top 100 in Toys & Games ) #271 in Hobby RC Cars |
| Customer Reviews | 4.7 4.7 out of 5 stars (130) |
| Item Weight | 1.58 ounces |
| Manufacturer | MRT |
| Manufacturer recommended age | 14 years and up |
| Package Dimensions | 5.2 x 3.5 x 0.2 inches |

## Images

![MRT Transponder, Works with mylaps RC3 RC4 Through V4.4 System for RC car Racing. - Image 1](https://m.media-amazon.com/images/I/51lOUXRBNXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works like a charm!
*by I***N on July 30, 2025*

Works great at both my outdoor track and local indoor clay racing track. Obviously you want to check with your track owners to assure compatibility with whatever lap tracking system and version they are using. But this seems to cover the most versions and main stream option for most tracks. No issues in my 5 race days.

### ⭐⭐⭐⭐⭐ Best rc transponder
*by M***E on July 22, 2025*

Works perfectly at our track

### ⭐⭐⭐⭐⭐ Lapper
*by N***S on January 16, 2026*

Excellent product

## Frequently Bought Together

- MRT Transponder, Works with mylaps RC3 RC4 Through V4.4 System for RC car Racing.
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**Shop now:** [https://www.desertcart.com.au/products/120745182-mrt-transponder-works-with-mylaps-rc3-rc4-through-v4-4](https://www.desertcart.com.au/products/120745182-mrt-transponder-works-with-mylaps-rc3-rc4-through-v4-4)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-16*