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Image for DX7 7-Channel Air Transmitter Only MD2 from HorizonHobby
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Key Features

  • 20-model memory
  • Airplane and heli software
  • Switch assignment
  • P-mixes
  • 3-axis dual rate and expo
  • 3-position flap (airplane)
  • 5-point throttle curve (heli)
  • 3 flight modes plus hold (heli)
  • Gyro programming (heli)
  • CCPM, 2-servo 90 degree, 3-servo 90 degree and 3-servo 120 degree
  • Configured to default to airplane model type (all heli programming is available)


With the DX7 transmitter you’ll be able to fly anything from micro electric helis to big gas-powered IMAC planes without regard to frequencies and free from fear of interference. Calling this kind of thing “revolutionary”  just doesn’t cut it. It is nothing less than a quantum leap in RC technology that will change how you fly forever. Never again will the availability of a frequency pin dictate when you can take off. Never again will you have to ask, “What channel are you on?” Never again will your flying experience be interrupted by model-generated RF noise, interference from commercial broadcast towers or anyone on another RC system.

The big difference with DSM2® technology is that it not only flies any size model with absolute precision and complete freedom from interference, but it also processes its signal faster than any high-end 72MHz PCM system.

DSM2—Security and Speed:
Unlike most first-of-its-kind innovations, DSM2 technology is not an unproven concept. It is based on the same Spektrum 2.4GHz DSM® (Digital Spectrum Modulation) that RC car racers, as well as micro electric and park flyer modelers, have been enjoying for at least two years. Like DSM technology, DSM2 technology provides an impenetrable radio link that’s immune to every known type of RC interference. Because it operates at 1024-bit resolution, it provides the kind of locked-in response that will have pilots feeling more connected to their models than ever before.

ServoSync™ and ModelMatch™ Technologies—Extra Safety and Precision:
DSM2 and the AR7000 aren’t the DX7’s only marvels. Spektrum engineers have come up with two more patent-pending innovations that you’ll wonder how you ever lived without—ModelMatch™ and ServoSync™ technologies. ServoSync technology is an ingenious feature that actually resequences the bits of data the DX7 radio transmits based on the type of mixing you select. So, if you have a dual elevator on your big Extra or a 3-servo CCPM setup on your heli, ServoSync technology will see to it that those servos working together receive their impulses together. The result is more synchronized servo movement that translates into an undeniable, locked-in feel when you fly. ModelMatch technology puts an end to wrong model syndrome. Almost everyone who flies RC has at one time or another crashed because of neglecting to verify the model name on the transmitter display during preflight check. A unique code is embedded in the DX7 transmitter signal so that, if the wrong model’s name is on the screen, the model’s controls simply won’t respond.

DX6 owners and anyone else who flies small electric models will be pleased to know that the AR6000 receiver works perfectly with the DX7 transmitter, too. In fact, the AR6000 receiver will actually benefit from the DX7 transmitter signal speed advantages, as well as ModelMatch and ServoSync technologies. So whatever the aircraft, be it a .60-size heli or a 15-ounce foamie, it can fly with the DX7.

Always purchase products from a Horizon Hobby, Inc. authorized dealer to ensure authentic high-quality Spektrum product. Horizon Hobby, Inc. disclaims all support and warranty with regards, but not limited to, compatibility and performance of counterfeit products or products claiming compatibility with DSM2 or Spektrum products.

Attention: Horizon Hobby has confirmed that all Spektrum Products being sold by KoKo Technology are counterfeit. We consider it a danger to use these products, waive all liability and will not support any warranty or service in regards to them.

Band: 2.4GHz, 2.4GHz
Computer Radio: Yes
Model Type: Airplane, Sailplane
Modes: Mode 2
Modulation: DSM2
Channels: 7
Programming Features: Air Heli
Range: Full
Receiver: Not Included, Not Included
Transmitter (Tx) Battery Type: 1500mAh NiMH

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Is Spektrum allowed at AMA flying events?

The AMA (Academy of Model Aeronautics) has certified its use at all AMA fields and events when used as per the manufacturer's instructions. In fact, most event directors welcome Spektrum, as it eliminates the issues of frequency management.

What is DSM?

DSM or Digital Spectrum Modulation is Spektrum's proprietary method of implementing 2.4GHz spread spectrum technology for the R/C industry. DSM divides the 2.4GHz band into 80 individual channels (frequencies) and incorporates direct sequence spread spectrum with an embedded GUID (Globally Unique Identifier) code. DSM has been painstakingly optimized by our engineers for RC surface and aircraft use, offering the most robust RF link in the industry.

What is the difference between DSM and DSM2

DSM or Digital Spectrum Modulation is Spektrum's proprietary method of implementing 2.4GHz spread spectrum technology for the R/C industry. DSM divides the 2.4GHz band into 80 individual channels (frequencies) and incorporates direct sequence spread spectrum with an embedded GUID (Globally Unique Identifier) code. DSM has been painstakingly optimized by our engineers for RC surface and aircraft use, offering the most robust RF link in the industry.

What is DSMX?

A Natural Evolution

Spektrum launched the 2.4GHz RC revolution. Since then millions of hobbyists the world over have come to embrace 2.4GHz technology as the way to race and fly. Spektrum leads the way yet again with DSMX™; the world's first wideband, frequency-agile 2.4GHz signal protocol and the most advanced spread spectrum RC technology to date.

DSMX is a natural evolution of DSM2™ technology that is the result of several years of development. It builds on what has come before and takes DSM to the next level of robustness, reliability and efficiency without leaving current DSM2 users behind.

What is Frequency Agility?

What DSMX™ adds to the tried and true wideband technology of DSM2™ is the extra interference protection and faster reconnection times of frequency agility. But DSMX isn't just another frequency hopping system. It’s wideband agile.

DSMX frequency shifts are coordinated using the most advanced FHSS algorithm ever seen in an RC application. Unlike other FHSS transmitters that all hop in the same fixed patterns, every DSMX transmitter has its own unique frequency shift pattern calculated using its GUID (Globally Unique Identifier). And each pattern uses just 23 channels in the 2.4GHz spectrum.

By adding the agility of unique frequency shifts to the superior interference resistance of a wideband signal, and limiting those shifts to a smaller portion of the 2.4 band, DSMX transmitters provide on-channel interference protection that is simply second to none. The result is quicker reconnection times and superb response in the noisiest 2.4GHz environment.

What is Wideband DSSS?

The foundation DSMX is built on is the same foundation as DSM2™ - the superior on-channel interference resistance and coding gain of wideband DSSS. Compared to the wideband signal of a DSM2 or DSMX™ system, the narrow-band signal of other 2.4 transmitters is more likely to suffer crucial data loss in the event of on-channel interference. Think of wideband 2.4 as a river and narrow-band 2.4 as a stream. It takes much more interference to stop a river than it does to stop a stream.

The big reason wideband is so robust is coding gain. Essentially what this means is that the unique coding in a DSM2 or DSMX wideband signal allows it to be heard well above the noise of surrounding 2.4GHz signals without requiring any more power. In fact, a Spektrum wideband signal can achieve as much as 3X the range of its narrow-band competition using the same amount of power.

Is DSM2™ and DSMX equipment compatible?

Yes. DSM2 transmitters are forward compatible with DSMX receivers and DSMX transmitters are backward compatible with DSM2 receivers. And because DSM2 and DSMX share the same wideband DSSS foundation, all Spektrum users will enjoy superior range, speed and precision whether they're using DSM2 equipment, DSMX equipment or a combination of both.

Are DSM2 transmitters eligible for a DSMX add-on?

Yes, but DSM2 users who rarely, if ever, fly in big events or other "noisy" 2.4GHz environments may find the DSM2 equipment they have now is all they will ever need. The difference DSMX makes is only apparent when hundreds of 2.4GHz systems are in use at once. To see if your transmitter is eligible for the DSMX add-on, please visit, click on the “radios” tab, and select “DSMX addons” for more details.

What is Spektrum AirWare™ Software?

Spektrum AirWare™ software was developed exclusively by Spektrum from the ground up. This software includes all the programming functions an expert pilot could want, but you don't have to be an expert to use them. It also brings several unique benefits to Spektrum programmable transmitters that simply aren't available on other systems.

What is the Spektrum™ Data Interface?

The Spektrum™ Data Interface (SDI) is designed for use with standard SD memory cards and adds a whole new level of flexibility and ease-of-use. With the SDI, you will be able to:

Share setups with others who use the same radio as yours or transfer setups from your SD card to your PC and attach them to an e-mail. This makes it easy to gain from the experience of others or help others succeed. With the SDI, memory for thousands of models could be stored on the SD card or transferred to a PC hard drive for backup. And you can stay up to date with SDI, you won't have to send your Spektrum radio into a service center to get the latest Spektrum AirWare™ enhancements. You can download them onto your SD card and upload them to the transmitter yourself.

Does DSMX have ModelMatch™ and ServoSync™?

Yes. DSMX will provide users with these and the many other exclusive Spektrum advantages they already enjoy with DSM2.

What is X-Plus™?

The Spektrum™ X-Plus™ 8 module lets you add 8 fully proportional channels to specially equipped Spektrum transmitters and receivers with 10 or more proportional channels. Just plug it into the X-Plus port of a compatible receiver. It is ideal for scale modelers who like to push realism to the extreme with working accessories and lights in addition to the regular control functions. The DX10t and DX18 offer X-Plus.

How much range can I expect out of my radio system?

Spektrum park flyer receivers are designed for small models up to 2 pounds. Spektrum full range receivers are designed to handle any normal RC conditions. You should have no problem maintaining control as long as you maintain direct line-of-sight with your model. If you try to fly behind a group of trees or otherwise obstruct your direct line-of-sight, you could be susceptible to losing your control link.

Product Support Tips

Product Support

Technical questions about this Spektrum product should be directed to Horizon Hobby's Product Support Department:

Sales Support

If you would like to purchase this product, please go to the Store Locator or contact the Horizon Hobby Consumer Sales Department:

Horizon Hobby, Inc.
ATTN: Consumer Sales

4105 Fieldstone Road
Champaign, IL 61822
Email: Sales Phone:(800) 338-4639
Fax:(217) 355-1552