


AIT10R120
RC4 "3-Wire" Direct Powered Personal Transponder
MYLAPS RC4 "3-Wire" Direct Powered Personal Transponder
This is the MYLAPS RC4 "3-Wire" Direct Powered Personal Transponder. In R/C racing, details matter. The slightest change or modification can be the difference between making the box, or being a back marker. So MYLAPS developed the next generation RC4 3-Wire transponder to do more than just count your laps. The RC4 3-Wire provides the user with telemetry data such as lap times, connected voltage and ambient car temperature, information that can be used to shave seconds off your overall times. RC4 transponders are compatible with RC4 timing systems can be used for both indoor and outdoor on-road and off-road racing and will perform on just about any surface.
The Standard in RC Timing!
Each transponder comes with a unique number linking your car to you as its driver. You can get more than one transponder with the same personal number, or even pick your own lucky number. Note: Car ID & Custom RC4 transponders are individually made and delivery could take up to 4 weeks.
How Does it Work?
The system picks up the signal sent out by the transponder mounted on your car. This signal is analyzed and lap times are measured. The system knows exactly which lap you are on and what your position is. If the track has the system hooked up to an internet connection, the data is passed on and published to your personal MYLAPS account. When you drive on a track with a MYLAPS RC4 timing system installed, your account will also show you information about the connected voltage and ambient car temperature.
Your Personal Data
Your training and event results are uploaded by the track's system or race officials. You can check, analyze and share your performance data on your personal account online. Simply create a personal account and register your transponder.
Easy to Set Up & Maintain
It is easy to get your transponder in and out of your car using the holder that comes with your RC4 package. The holder should be installed at a maximum height of 15 cm (6 inches) above the ground. Transponders need to survive the heat of battle. RC4 transponders are shock and mud-proof and can be used safely for both indoor and outdoor racing. They can even be used for model boat racing. Because they connect to your car’s power output, you don’t have to worry about recharging them. If you use your transponder a lot, it can get dirty over time. Use a soft brush and some lukewarm water to clean it.
Specifications:
Max Speed: 120 km/h (75 mph)
Temperature Range: 0 - 50°C (32 - 122°F)
Dimensions: 16x19x6mm (0.7x0.8x0.2")
Weight (Including Holder): 4.7g
Operating Voltage: 3.0 - 16 VDC
Humidity: Max. 90% relative
Signal Transfer: Magnetic induction
Code Resolution: 1.5 ms
Power: Feed from free receiver channel (ch3 or batt)
Connection Plug: Connect using a standard Servo plug
Power Consumption: 14mA @ 6 VDC
Wire Insulation: Aerospace/MIL-spec high-temp PTFE (Gasoline/Nitro resistant)
Quick Change Holder: Yes
Compatible With: RC4 Timing System only!
Includes:
- (1) RC4 "3-Wire" Personal Transponder
- (1) Holder
- (1) MYLAPS sticker
NOTE: See image below for a list of transponders and compatible MYLAPS decoders. Be sure to check with your local track for transponder/system compatibility.
Pairs well with
Easy to use for beginners
Durable build for long-lasting fun
Quick recharge and extended range for all-day play
Perfect for pools, lakes, and calm rivers

RC4 "3-Wire" Direct Powered Personal Transponder
Product details
Collapsible row
Use collapsible tabs for more detailed information that will help customers make a purchasing decision.
Ex: Shipping and return policies, size guides, and other common questions.
Collapsible row
Use collapsible tabs for more detailed information that will help customers make a purchasing decision.
Ex: Shipping and return policies, size guides, and other common questions.

Engineered for Speed. Built for Control.
Our RC vehicles and parts are crafted with cutting-edge tech and tested for durability. From high-speed drones to rugged RC cars and boats, every product delivers serious fun and unmatched reliability.
Performance You Can Trust
Join thousands of RC enthusiasts who count on ParkFlyers for top-tier quality, responsive customer support, and an unbeatable collection of parts and models.
Got Questions? We've Got Answers
What types of RC vehicles do you sell?
We offer a wide range of RC vehicles including airplanes, drones, helicopters, cars, trucks, boats, and a full selection of parts and upgrades for each.
Are your products ready to run (RTR) or require assembly?
Most of our models are RTR (Ready to Run) or RTF (Ready to Fly), meaning they include everything you need out of the box. Some kits may require minimal assembly—check the product description for details.
Do you offer replacement parts?
Yes! We stock replacement parts for most models we sell. If you’re not sure which part you need, contact our support team and we’ll help you find the right match.
How long does shipping take?
Orders typically ship within 1–2 business days. Delivery time depends on your location, but most customers in the U.S. receive their orders within 3–7 business days.
Do you ship internationally?
At the moment, we primarily ship within the U.S., but international shipping is available on select items. Please contact us for a custom quote.
























