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Vital Model Info in Real Time

Spektrum™ telemetry technology makes it possible for you to get real-time information on your model's battery voltage, motor rpm, motor temperature and more. Many Spektrum transmitters feature built-in telemetry data receivers that let you view this information on their LCD screens. You also have the option of monitoring telemetry using the Spektrum STi™ app for the Apple® iPad®, iPhone® or iPod Touch®.

You will find the entire selection of Spektrum telemetry modules, sensors and accessories here.

Spektrum™ STi™ app Made for iPod®, iPhone®, and iPad®

The STi lets you transmit vital info from your model's on-board Spektrum™ telemetry module directly to your iPhone®, iPad® or iPod touch®.* It can also be programmed to alert you when any telemetry value you're monitoring exceeds limits you define. It's a great way to keep tabs on your model if you're flying with a DSM2™/DSMX™ Spektrum or JR®/DSM® transmitter that doesn't have built-in telemetry.

STi Telemetry Interface

Battery Voltage

Never again will you have to wonder whether or not you have enough voltage to keep flying. Being able to monitor voltage will also help you detect a worn out battery pack before it prematurely ends your flight. The telemetry module is plugged into the receiver and will automatically relay receiver voltage. A separate sensor for tracking main battery voltage in electric aircraft will be included.

Battery voltage sensor: EC3
Battery voltage sensor: D.Ultra
Battery voltage sensor: JST


Measures airspeed from approximately 2 MPH to 350 MPH. TM1000 Compatible.

Airspeed sensor

Signal Quality

Spektrum telemetry modules keep tabs on the quality of the signal coming to the receiver and send this information back to the transmitter where it is represented on the LCD screen using a familiar "signal bar" scale.


Is the engine running too lean? Is there enough airflow reaching an electric motor? Is my battery getting too hot? Get real-time answers and take action well before damage occurs.

Temperature sensor


Pilots can use the RPM telemetry data to check the effectiveness of new mixture settings, new battery packs, or perhaps a new propeller/motor combination.

RPM sensor


Measures up to approximately 1000m above ground level. Advanced software allows processor to compensate for variations in temperature

Altimeter sensor


Along with providing your model’s exact latitude and longitude, a Spektrum GPS sensor lets you track groundspeed, elevation and heading. You can use this information to locate downed models, gauge the effects of wind or simply prove to all those naysayers that you really can go “that fast”.


The incredibly compact Spektrum variometer reports both rate of climb and altitude. Because it was designed for the slender confines of a sailplane fuselage, you will find it’s easy to install in most anything you fly.

*Requires the free STi app. Compatible with iPad, iPod touch (4th gen), iPhone 4, iPhone 3GS, and iPhone 3G. Made for iPod," "Made for iPhone," and "Made for iPad" mean that an electronic accessory has been designed to connect specifically to iPod, iPhone, or iPad, respectively, and has been certified by the developer to meet Apple performance standards. Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards. Please note that the use of this accessory with iPod, iPhone, or iPad may affect wireless performance. Apple®, iPad®, iPhone®, iPod® and iPod touch® are trademarks of Apple, Inc., registered in the U.S. and other countries. Made for iPad logo™, Made for iPhone logo™ and Made for iPod logo™ are trademarks of Apple, Inc.