Android radio is an event-driven, cross-process communication mechanism in the Android system, primarily used for messaging between applications and between the system and applications. Its core consists of broadcasts, broadcast receivers, and intents, operating in a publish-subscribe model.
System Event Notifications
The system sends broadcasts when key events occur, such as device bootup, charging status changes, network connection status changes (such as enabling/disabling airplane mode), and battery charge level changes. All components subscribed to these events receive notifications.
Custom Event Notifications
Applications can use broadcasts to notify other applications or components of interesting events, such as the completion of new data downloads and service status updates. This mechanism supports loosely coupled communication between components, without requiring the sender to know the specific implementation details of the receiver.
Inter-Process Communication
Different processes or applications can use broadcasts to communicate across processes, such as a server sending commands or data update notifications to a client, without requiring direct service binding or shared memory.
Notes
Low latency requirements: The system optimizes broadcast transmission methods, but cannot guarantee real-time delivery. Avoid using broadcasts for critical tasks.
Resource Limitations: Background tasks that rely too heavily on broadcasts may lead to system resource constraints. Careful design of background job logic is required.
ltems |
Details |
Note |
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Operation system |
Android based OS (5.1.1) |
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Frequency |
L811 (European/Asia |
|
Frequency bands can be |
L813 (Asia version) |
■GSM Band2/3/8 |
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L817 (America |
■GSM: 850MHz,1900MHz |
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LTE |
CAT 4 |
TDD CAT4 |
|
Wi-Fi |
802.11b/g/n,2.4GHz |
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LED |
Green,Red,Yellow |
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Speaker |
W,8Ω |
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Mic |
mic |
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SIM |
Single Micro SIM slot |
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Connectivity |
3.5mm Audio Jack |
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SD card slot |
Micro SD |
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Bluetooth |
BT 4.0 LE and earlier,Class2 (For |
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GNSS |
GPS,GLONASS,Beidou |
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Screen |
Size (inch) |
1.77 |
|
Resolution |
128*160 |
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Dimensions (Without antenna) |
110mm*57mm*31mm |
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Weight (Including battery and |
Around 210g |
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Camera |
Flashlight |
YES |
We also have a without |
Pixels |
800W |
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Focus type |
AF |
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ROM |
8GByte |
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RAM |
1GByte |
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ROM |
4GByte |
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RAM |
512MByte |
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Normal |
MENU key,Back key,Direction key, |
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Numeric key |
NO |
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Side key |
PTT key,M1,M2 |
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Top key |
Combination Knob: |
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Battery |
Type |
Li-polymer |
|
Capacity (mAh) |
4000 |
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Charger current |
1000mA |
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Charging Time |
≤5 Hours |
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Sound |
Microphone |
1 |
|
Line-Control earphone |
YES |
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Speaker |
YES |
||
Speaker PA |
YES |
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Antenna |
LTE Main antenna |
Rodlike |
|
Auxiliary antenna |
FPC |
||
WIFI/BT |
FPC |
||
GPS/BD |
ceramic chip antenna |
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Operating temperature |
-20℃ to 60℃ |
Using traditional trunking solution would occur high cost, the GPS function in H28Y supply you high efficiency in trunking, also improved productivity of the assignment can now be done based on the location by console.
The Dispatch Console allows efficient management to increase productivity
It is Android 5.1.1, more flexible for users to adopt kinds of platforms.
Under WiFi coverage, users can freely choose to use WiFi connect, save costs on network.
With IP54 design, H-28Y can be used in variety environment.
With 4000/4400/5000/6000mAh capacity, H-28Y supply you long standby time.
Unique for: Security Guard, Construction site, Industry Production site;
Commercial usage: Hotel, Hospital, University,
Commercial Event: Sports,
Public Security: Airport, Railway, Army, Government, Rescue, Police, Outdoor adventure, Logistics, Taxi, Truck, Camping, Traveling, Big shopping mall, Big Hotel, Outdoor Events, etc.
Compatible with multiple dispatching management platforms with various functions, such as Private
Call/Group Call, SOS, GPS navigation, radio track playback... Currently, we have already integrated with Lisheng’s own platform, TASSTA, ZELLO, RealPTT, POCSTAR, ZTE…
The radio adopts 1.77 inch colored LCD display, which makes the display information clearer even under strong light.
APN settings are flexible to accommodate every SIM card.
GPS and NFC Patrol (Optional)
With a powerful platform, the patrol function can be used in various scenes, such as staff going out to work, work attendance, patrolling and other scenes.
we are committed to delivering top-quality two-way radio products, ensuring each product meets the highest standards through rigorous inspection and packaging processes. Our inspection and packaging team bears the responsibility of ensuring customers receive reliable products, providing a worry-free user experience.
1、Visual Inspection: Each two-way radio undergoes a thorough visual inspection to ensure flawless aesthetics that align with the company's brand image.
2、Functionality Testing: Our inspection team conducts comprehensive functionality tests on every radio, ensuring all features operate correctly. This includes key functions such as audio quality, signal strength, and channel switching.
3、Durability Testing: Products undergo durability tests to ensure they function properly in various environmental conditions, including extreme temperatures, humidity, and vibrations.
4、Battery Performance Testing: Battery life is crucial for radio performance. Strict performance tests are conducted on batteries to ensure reliable, extended use.
1、Anti-Static Packaging: Each radio undergoes anti-static packaging to prevent electrostatic damage during transportation.
2、Environmentally Friendly Packaging: Committed to sustainability, our packaging materials adhere to international environmental standards.
3、Shock-Resistant Packaging: Professional shock-resistant packaging is employed during transportation to prevent damage to products.
4、Integrity Check: The packaging team performs a final integrity check to ensure products remain intact and undamaged after the packaging process.
Our inspection and packaging processes aim to surpass customer expectations, ensuring that every two-way radio received has undergone rigorous testing and meticulous packaging as a high-quality product.