Open Source Android DMR Dual Band Radio
ComJoT Radios CJ - 1UV
The world’s first Open Source Dual Band Android Amateur Radio!
No need to have an Android Radio with Old, Legacy Operating System
CJ-1 is running Android 14
DMR Tier 1 and 2 + FM Analog (136-174MHz, 400-480MHz)
If you work or volunteer in public safety, we offer special discounts as a thank-you for serving your community.
Click below to tell us how you serve and access exclusive savings.
Open Source Innovation
The Open Source Advantage
Unlock Endless Possibilities with the Open Source ComJoT CJ-1: Customize, Collaborate, and Stay Ahead!
Freedom
Make It Your Own - Open source means you can tweak the CJ-1 to fit your exact needs, like adding new features or changing the way it works.
Endless Possibilities
Unlock Your Creativity - You’re not limited to what comes out of the box. With open source, you can create new applications and tools for your radio.
Join a Community
Being open source means you're part of a global community where you can share ideas, solutions, and improvements.
Stay Updated
Continuous Improvements - Open source projects are constantly evolving. You get the benefit of regular updates and improvements made by others.
Cost-Effective
Save Money on Upgrades - With open source, you don’t have to pay for every new feature. You can add and upgrade features yourself, or benefit from others’ contributions for free.
Transparency
Know What’s Inside - You can see exactly how the CJ-1 works and trust that there are no hidden tricks or vulnerabilities.
Learning
Grow Your Skills - Working with open source helps you learn more about how your device works, giving you valuable tech skills.
Flexibility
Adapt to Any Situation - Because you can modify the CJ-1, it can adapt to any situation or need, making it incredibly versatile.
Future-Proof
Ready for What's Next - Open source ensures that your device can keep up with new technology and trends, keeping it relevant and useful longer.
One Device that is your:
Mobile Phone
Dual Band Ham Radio
External Speaker Mic
Seamless Integration
The CJ-1 effortlessly integrates with an external speaker mic, allowing users to experience improved audio clarity and ease of use. Whether you’re in a noisy environment or need to keep your hands free, the external speaker mic ensures that your communication is crystal clear and uninterrupted.
Enhanced Audio Quality
By connecting the CJ-1 to an external speaker mic, users benefit from superior audio output. The speaker mic amplifies the sound, making it easier to hear and be heard, even in challenging conditions. This is particularly beneficial for outdoor activities, events, or any situation where background noise can be an issue.
Choose the Rom that fits you best! DeGoogled or Google-Certified
Google Certified for Full Access to Google Play Store and Services!
The CJ-1 being Google Certified means it has passed Google’s strict tests to ensure it meets high standards for performance and security. This certification allows you to access the Google Play Store and use Google services, just like on your smartphone. So, you can download and use your favorite apps, enjoy seamless updates, and benefit from the latest features and security measures that Google offers. In short, it makes the CJ-1 as easy and versatile to use as any Android device you’re already familiar with.
Unleash the Power of the CJ-1: Your Ultimate DeGoogled or Google-Certified Dual-Band Radio!
Technical Specifications
CJ-1
| BASIC INFO | |
| Model No. | ComJoT CJ-1 |
| Dimension | 148*71*25mm |
| Weight | 360g |
| Operating system | Android 14.0 |
| HARDWARE | |
| Display | 4.0 inch IPS capacitive touch screen, 480*800px |
| CPU | MT6762 Cortex A53 octa core, 2.0GHz; GPU: IMG PowerVR GE8320 650MHz |
| RAM | 4GB RAM |
| ROM | 64GB ROM, support TF card extension up to 256GB maximally |
| Camera | Front camera: 8MP, Rear camera: 13MP AF with flashlight |
| Sensor | Gravity sensor, light sensor, proximity sensor, E-compass |
| Battery | Removable 7.6V/3000mAh lithium cobalt oxide battery |
| Speaker | Φ36/8Ω waterproof speaker |
| NETWORK & CONNECTIVITY | |
| Band | 2G: GSM 850/900/1800/1900MHz |
| 3G: WCDMA 850/900/1700/1900/2100MHz, TD-SCDMA:B34/39 | |
| 4G: FDD-LTE:B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B66, TDD-LTE:B38/39/40/41; CDMA:BC0 | |
| WIFI | IEEE 802.11 a/b/g/n/ac, support 2.4/5GHz dual-band WiFi |
| BT | V5.0 |
| NFC | Support |
| GNSS | Support GPS/A-GPS/BEIDOU/GLONASS |
| INTERFACES | |
| Micro SIM slot | *2 |
| TF card slot | *1 |
| USB Type-C | *1 |
| M6 Port | *1 |
| OTHER FEATURES | |
| DMR/Analog Radio | TX UHF:420-450MHz and VHF 144-148MHz; RF power: high: 4W, low: 2W; FM Analog and DMR; |
| POC Button | Support |
| SOS Button | Support |
| OTG Function | Support |
| Active Noise Cancellation | Support |
| RELIABILITY | |
| Waterproof/Dust-proof | IP68 waterproof |
| Drop-proof | Withstand 1.2m height for 6 sides and 4 corners |
| Temperature range | Operating: '-35℃~+70℃ |
| ACCESSORIES | |
| USB Charger(5V/2A) | *1 Type C 10W 2A quick charger |
| USB Cable | *1 |
| Battery | *1 Standard 3000mah |
| Belt Clip | *1 |
| User Manual | *1 |
| Charging Dock | Optional |
⚠️ FCC COMPLIANCE NOTICE — IMPORTANT USER INFORMATION
This device, is designed exclusively for operation within the frequencies authorized under Part 97 of the FCC Rules for licensed amateur radio operators.
⚠️ Unauthorized Modification Warning
Modifying this radio to enable transmission outside the amateur radio bands is a violation of federal law and may result in fines, equipment confiscation, or other enforcement action by the Federal Communications Commission (FCC).
Do not attempt to alter hardware or software to operate on public safety, commercial, or other non-amateur frequencies.
Any such modification voids FCC compliance and any warranty provided by ComJoT LLC.
⚠️ Intended Use
This device is intended solely for licensed amateur radio operators. Use of this device on unauthorized frequencies, or without the appropriate FCC license, is strictly prohibited.
For more information on FCC rules and your responsibilities as a radio operator, please visit:
📎 https://www.fcc.gov/wireless/bureau-divisions/mobility-division/amateur-radio-service
Thank you for respecting federal regulations and helping to keep the airwaves safe and interference-free.
— ComJoT LLC