TWS-DS High-Frequency Wireless Transmitter Module
Core Advantages
The TWS-DS series is a professional-grade high-frequency wireless transmitter module, employing advanced ASK modulation technology to provide excellent signal stability and transmission reliability. This series of modules is meticulously designed, featuring a wide power voltage range (1.5~12V), adapting to various application environment requirements.
The module supports a maximum data transmission rate of 8Kbps, with a peak output power of up to 40mW, ensuring stable long-distance communication. It features fast switching capability (maximum 40μs), suitable for real-time control applications. The wide operating temperature range of -40°C to +75°C allows for stable operation in harsh environments.
Multiple Frequency Options
Offers six frequency versions: 303.875MHz / 310MHz / 315MHz / 318MHz / 418MHz / 433.92MHz, meeting diverse regional regulations and application needs.
High Output Power
Standard 10mW output, up to 40mW, ensuring stable long-distance transmission, suitable for open spaces and complex environments.
Wide Voltage Range
Supports 1.5V to 12V wide-range power input, adaptable to various battery and power systems, reducing design complexity.
Industrial-Grade Durability
Operating temperature -40°C to +75°C, validated through rigorous testing, suitable for outdoor and harsh industrial environments.
Complete Technical Parameter Comparison Table
The TWS-DS series offers six different frequency versions. Below is a comprehensive comparison of the technical specifications for each model. All models share the same hardware design and packaging, differing only in operating frequency, allowing engineers to select the appropriate version based on project requirements. Frequency tolerance is controlled between ±0.25MHz to ±0.30MHz, ensuring signal accuracy and system compatibility.
Technical Parameter
Unit
DS-1
DS-2
DS-3
DS-4
DS-5
DS-6
Operating Frequency
MHz
303.875
310
315
318
418
433.92
Frequency Tolerance
MHz
±0.25
±0.25
±0.25
±0.25
±0.25
±0.30
Data Rate (ASK)
Kbps
Max 8K
Max 8K
Max 8K
Max 8K
Max 8K
Max 8K
Peak Input Current (12V)
mA
Max 53
Max 53
Max 53
Max 53
Max 53
Max 53
Peak Output Power
mW
10 /
Max 40
10 /
Max 40
10 /
Max 40
10 /
Max 40
10 /
Max 40
10 /
Max 40
Power Supply Voltage Range
VDC
1.5 ~ 12
1.5 ~ 12
1.5 ~ 12
1.5 ~ 12
1.5 ~ 12
1.5 ~ 12
Switching Time
μs
Max 40
Max 40
Max 40
Max 40
Max 40
Max 40
Operating Ambient Temperature
°C
-40 ~ +75
-40 ~ +75
-40 ~ +75
-40 ~ +75
-40 ~ +75
-40 ~ +75
Absolute Maximum Ratings
The following are the absolute maximum ratings for safe operation of the module; exceeding this range may cause permanent damage:
Power Supply and I/O Pin Voltage
-0.3V to +12.0V
Voltage range for all power supply and input/output pins. Do not exceed this limit to avoid damaging the module.
Soldering Temperature Limit
230°C (10 seconds)
Maximum temperature and time limit for manual or reflow soldering. A temperature-controlled soldering station is recommended.
Pin Definition and Connection Instructions
The TWS-DS series features a standard 4-pin design, simplifying the integration process and reducing design complexity. All models share identical pin definitions, allowing engineers to quickly switch between different frequency versions without modifying the PCB layout. The module uses a 2.54mm pitch design, enabling direct insertion into breadboards or soldering via pin headers onto a PCB.
It is recommended to connect a 100nF ceramic capacitor in parallel with a 10μF electrolytic capacitor between VCC and GND for stable power filtering. For antenna connection, a 50Ω impedance matching design is suggested to achieve optimal transmission performance. The Data In pin supports TTL/CMOS logic level input and can be directly connected to an MCU or other digital logic circuits.
Pin 1 - GND
Power Ground
Connects to the system ground, providing a current return path. Short and thick ground wires are recommended to reduce impedance and ensure signal stability and EMI performance.
Pin 2 - Data In
Data Input
Digital signal input terminal, accepting ASK modulated signals from a microcontroller or encoder. Supports TTL/CMOS logic levels, high level for transmission, low level for stop.
Pin 3 - VCC
Positive Power Supply
Module operating power input, supporting a wide voltage range from 1.5V to 12V. It is recommended to add decoupling capacitors close to the module to enhance power stability.
Pin 4 - ANT
Antenna Output
RF signal output terminal, connected to a 50Ω antenna. It is recommended to use a single-pole antenna or printed antenna of appropriate length for optimal communication range.

⚠️ Important Reminder
Please ensure the antenna is correctly connected before powering on and testing. Prolonged operation without an antenna connected may lead to RF power reflection, affecting module lifespan or causing damage. During the testing phase, it is recommended to use a 50Ω dummy load or a spectrum analyzer for signal monitoring.
Transmitter Module and Receiver Compatibility
TWS-DS series transmitter modules offer multiple receiver pairing options for different frequencies, ensuring flexibility in system construction. This table details each transmitter module model and its corresponding receiver models, helping you quickly select and achieve stable and reliable wireless communication. All combinations can achieve a transmission distance of up to 500 meters.
Transmitter Model
Frequency (MHz)
Compatible Receiver Models
Distance (M)
TWS-DS-1
303.875
RWS-371F、RWS-371、RWS-374、RWS-375
500
TWS-DS-2
310
RWS-371F、RWS-371、RWS-374、RWS-375
500
TWS-DS-3
315
WS-434LL、RWS-434N、RWS-371F、RWS-371
500
TWS-DS-4
318
RWS-371F、RWS-371、RWS-374、RWS-375
500
TWS-DS-5
418
RWS-371F、RWS-371、RWS-374、RWS-375
500
TWS-DS-6
433.92
WS-434LL、RWS-434N、RWS-371F、RWS-371
500
These verified module combinations ensure optimal RF performance and reliable data transmission, suitable for various long-range wireless applications, simplifying your product development process.
Industrial Control and Security Monitoring Applications
The TWS-DS series modules, with their high stability, wide temperature range, and strong anti-interference capabilities, are widely used in industrial automation, security monitoring, and remote control systems. The module's high output power ensures stable communication even in complex electromagnetic environments, making it suitable for large areas such as factories, warehouses, and parking lots.
Wireless Security Alarm Transmission
Suitable for wireless signal transmission of security equipment such as anti-theft alarms, smoke detectors, and door magnetic sensors, ensuring immediate notification of emergencies.
RF Remote Control Systems
Applied to electric gate control, garage door remote control, access control systems, vehicle anti-theft devices, etc., providing reliable wireless control solutions.
Industrial Wireless Data Transmission
Supports applications such as factory production line monitoring, equipment status reporting, and process parameter transmission, reducing wiring costs and enhancing system flexibility.
Remote Sensor Data Reading
Integrates equipment such as temperature and humidity sensors, pressure sensors, and liquid level gauges to achieve wireless data acquisition and monitoring. Suitable for environmental monitoring, agricultural irrigation, water level monitoring, and other scenarios, significantly reducing wiring and maintenance costs.
Smart Device Remote Control Terminal
Serves as a wireless control transmitter for various smart devices, including home appliance control, lighting systems, and curtain control. Supports pairing with existing RF receiver modules to quickly achieve wireless upgrading of products.