Portable DMR Radio
LS-T278
The LS-T278 professional digital radio is designed for high-demand industry communication scenarios, combining clear voice quality with comprehensive safety features. The device supports AES-256 encryption as well as remote monitoring, deactivation, and activation, providing full protection for communications and assets. Dual-slot direct mode improves spectrum efficiency, while single, group, and all-call functions enable flexible dispatch for multi-team operations. Equipped with intelligent noise reduction and VOX hands-free operation, the radio maintains effective communication even in noisy environments. Low battery alerts and programmable keys further enhance ease of use and reliability in the field. The LS-T278 delivers a stable, secure, and easily managed professional digital communication experience.
Product Orientation Map
Features
Specifications
Accessories
■AES256 Encryption
Utilizes the AES256 encryption to ensure the utmost security of communications and enhance information safety.
■Noise Cancellation
Reduces ambient and background noise using intelligent algorithms, ensuring that the user’s voice is transmitted clearly even in noisy environments such as construction sites, warehouses, or outdoor operations.
■VOX
Automatically triggers transmission when the user speaks, allowing hands-free communication. This is especially useful for personnel who need to keep both hands free for tasks like handling equipment, driving, or field inspections.
■Programmed Buttons
Allows frequently used functions to be assigned to customizable keys, enabling one-touch access for rapid operation. Users can configure keys based on role requirements, improving efficiency in high-frequency or emergency situations.
■Power Saving
Automatically reduces power consumption when the radio is idle, extending battery life and ensuring the device can operate for a full shift or extended fieldwork.
■Power Save Delay
Keeps the radio fully active for a configurable period before entering power-saving mode, preventing interruptions during short pauses in operation while still conserving energy over time.
■Low Battery Alert
Provides visual or audio warnings when battery levels drop below a preset threshold, allowing users to plan recharging in advance and avoid sudden communication loss during critical tasks.
■Remote Kill/Revive/Stun
Enables authorized control to remotely disable, reactivate, or temporarily disable the radio in case of loss, theft, or misuse. This protects sensitive communications and prevents unauthorized use.
■Call Alert
Generates audible and/or visual notifications when receiving a call, ensuring that incoming communications are noticed promptly, even in noisy or visually distracting environments.
■Auto Power-off
Automatically turns off the device after a preset period of inactivity to save battery, ensuring energy efficiency without manual intervention.
■Talk Around
Allows direct communication between radios without relying on a repeater or network infrastructure. This is ideal for areas with limited coverage or emergency scenarios where standard network resources are unavailable.
■Frequency Hopping
Automatically switches transmission frequencies during operation to reduce interference and eavesdropping, enhancing communication security and reliability in sensitive or congested environments.
Appearance Introduction

Product Accessories
Charger Pod
Antenna
AC Adaptor
Hand Strap
Belt Clip
Battery
| General | |
| Frequency Range |
136~174MHz,350~400MHz 400~470MHz,450~520MHz |
| Channel Spacing | 12.5 KHz / 25 KHz |
| Channel | 48 Channels |
| Zone Capacity | 3 Zones |
| Operating Voltage | 7.4V |
| Battery Capacity | 1000mAh |
| Battery Life (5/5/90) | Analog: 6.7 hours ; Digital: 8.8 hours |
| Vocoder Type | AMBE+2 |
| Frequency Stability | ±1.0ppm |
| Antenna Impedance | 50Ω |
| Dimensions (without Antenna) | 4.88"H x 2.44"W x 1.54"D (124mm*57mm*39mm) |
| Weight | 7.73oz(219g) |
Receiver
Analog Sensitivity
0.2μV (12dB SINAD)
Digital Sensitivity
0.22μV (Typical) (BER 5%)
Adjacent Channel Selectivity
60dB @ 12.5KHz / 65dB @ 25KHz
Intermodulation Rejection
60dB @ 12.5KHz / 60dB @ 25KHz
Blocking
84dB @ 12.5KHz /84dB @ 25KHz
Co-Channel Rejection
-12dB @ 12.5KHz
-8dB @ 25KHz
Spurious Response Rejection
65dB @ 12.5KHz / 65dB @ 25KHz
Rated Audio Output Power
1.0W /16Ω
Conducted Spurious Emission
<-57dBm(9KHz~1GHz)
<-47dBm(1GHz~12.75GHz)
Transmitter
RF Power
1W (Low) / ≤5W (High)
Power Margin Variation
+2/-3dB (under Extreme Conditions)
Frequency Error
±1.0ppm
FSK Error
<5%
4FSK Transmission
Bit Error Rate (BER)
≤1×10-4
4FSK Modulation
Frequency Deviation Error
≤10.0%
Occupied Bandwidth (DMR)
≤8.5KHz
TX Attack/Release Time
≤1.5ms
Adjacent Channel Power
≤-50dB @12.5KHz /≤-60dB @25KHz
Transient Adjacent Channel Power
≤-50dB @ 12.5KHz / ≤-60dB @ 25KHz
FM Modulation
16K0F3E @25KHz/
11K0F3E @12.5KHz
4FSK Digital Modulation
12.5KHz(data only):7K60FXD
12.5KHz(data+voice):7K60FXE
Audio Distortion
≤3% @ 40% Deviation
Audio Response
+1 ~ -3dB
FM Hum and Noise
40dB @ 12.5KHz / 45dB @ 25KHz
Spurious Emission
≤-36dBm (9KHz~1GHz)
≤-30dBm (1GHz~12.75GHz)
*The above specifications are tested in accordance with applicable standards. Due to the continuous development of technology, the above index data are subject to change without notice.
Product accessories
Charger Pod
Antenna
AC Adaptor
Hand Strap
Belt Clip
Battery
About Us
Products
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Contact Us
Service line
+86-(0)595-22471179
#5, Chongxiang Street, Econ.&Tech. Area, Quanzhou, Fujian, China.
WeChat:+86-15257537337; +86-13615902728
E-mail:sales@cnlisheng.com