ImmersionRC LapRF Personal Race Timing System


The ImmersionRC LapRF Personal Race Timing System is a personal race timing system for FPV quads using 5.8GHz video feeds.

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SKU: LAPRF1 Categories: ,


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ImmersionRC LapRF Personal Race Timing System


  • The LapRF is a personal race timing system for FPV quads using 5.8GHz video feeds.
  • The passing of a quad through the start/finish gate is precisely measured using the energy emitted by the 5.8GHz transmitter on the quad.
  • Custom fully-programmable timing receivers, coupled with ImmersionRC’s timing antennas ensure that the performance of this system is on a different level than competing products.
  • Super-precise with one pilot, but also supporting multiple pilots for smaller events without purchasing multiple units (up to 8 with lower gate speeds as found in the micro-quad world).
  • Bluetooth connection to Android and iOS devices, with free applications downloadable from their respective app. stores.
  • Fully integrated with the industry standard LiveTime event management software.
  • Integrated 2600mAh Li-ion battery, with integrated USB charger, gives 8 hour race time.


  • Initial Release Date: June 2017
  • Dimensions: L=100mm x W=100mm x H=25mm
  • Weight: 121g (with battery)
  • Channels: All common (+ some rare) Analog + Digital 5.8GHz
  • Antenna: Custom RHCP/LHCP/Linear
  • RF Connector: U.FL
  • Pilots: 1 to 8, depending upon required precision and gate speed
  • Battery: 18650, 2600mAh, 3.7V Nominal
  • Bluetooth: BLE, Bluetooth Smart
  • BT Range: Approx. 100ft with internal antenna
  • BT Antenna: Internal FCC/CE/CTick, with External option
  • App Support: iOS and Android
  • Ports: Wireless Bluetooth, and Wired USB
  • License: Perpetual, nothing to install, ever


Easy To Use

It doesn’t get much easier. Power on the LapRF, drop it in the start/finish gate, select its ID in the free Android/iOS app, select the number of pilots, and video channels used, and start racing. The LapRF will run all day, measuring lap times and speaking the results. There is no better tool to allow pilots to measure their performance, and work to improve it.

ImmersionRC LapRF Personal Race Timing System mantisfpv

No More Transponders!

The lapRF uses the Radio Frequency energy emitted by the Video Transmitter on the model to detect its presence within the race gate. The current generation of racing drones have two things in common, they all use 5.8GHz video downlinks, and they all need to be on different channels to race together. This is all that the lapRF system needs to precisely time events. No RFID transponders, no Infra-Red transponders, no complex installations. Just place the lapRF system in the start/finish gate, and start racing.

ImmersionRC LapRF Personal transponders Race Timing System mantisfpv

Bluetooth Link to Phones and Tablets

The LapRF Personal Timing System includes a Bluetooth module that can quickly link an iOS or Android device to the gate. Enter pilot names, start the race, and the lap times will be spoken along with the pilot’s name.
All lap times will be shown in a table, along with the average, and best lap times. Any loss of Bluetooth connection will not result in loss of lap times. When Bluetooth is reconnected, all missed lap times will be transferred to the app. iOS downloadable from here, and Android app from here.

ImmersionRC LapRF Personal transponders Race Timing System bluetooth mantisfpv


  • 1x ImmersionRC LapRF Personal Race Timing System

ImmersionRC LapRF Personal Race Timing System MantisFPV 1

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Why Us

MantisFPV is the best place to buy the ImmersionRC LapRF Personal Race Timing System online.

Our stock levels

Are 99.8% accurate. What you see online regarding stock, is WHAT WE HAVE in hand, ready to be dispatched/shipped. Really.
We do try to stock everything, but that is simply a tall order. If you need something that we don’t have, let us know here.


We try to price competitively and fairly. MantisFPV is all about having the right FPV parts in stock, when you need it.
Are we the cheapest? We try. If we are not, fill in the “Price Match Request” form on this page.

Same day shipping

Orders received before 2pm on weekdays are processed and shipped that very day.

Local Pickup

Are you nearby Parramatta? Simply opt for local pickup when you place your online order. Sometimes, you just need something… RIGHT NOW.

Australian owned and operated

Made with ❤️ in Parramatta, Sydney. We are indeed a local Aussie small business. We are GST registered, so we pay our fair share of GST collected from our sales. Help support your local Aussie FPV store, forget those overseas stores like Banggood or AliExpress. Help keep our profits within our shores. Heck, who can really tolerate deliveries that takes 3 months?!

Shocker!… we have running costs

Maintaining, stocking, shipping and importing FPV parts costs money and carries inherent risks. We try our very best to be competitive in pricing but we also need to pay for wages, rent, taxes and pay for the bad stuff, like dead stock, shrinkages, fraud and importing challenges. However, we forget all this when we are able to help cure treat your FPV addiction 🙂

Return Policy

All FPV products will generally require an RMA from the manufacturer themselves, not us.

If you feel that the products are defective, please contact the manufacturer directly.

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