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Item specifics
  • Brand Name: G-NiceRF
  • Model Number: SV651 kit2
  • Interface:: TTL/RS232/RS485 ( Optional )
  • Frequency Range: : 433/470/868/915 MHz (Customizable 240-930 MHZ)
  • Operating voltage range: 3.3~6.5V
  • Reveive current: 25mA @ TTL / 32.7mA @ 232 / 34mA @ 485
  • Emission current: 350mA @ 27dBm
  • Sleep current: <5uA
  • Transmit power range: 20~27dBm
  • Receiving sensitivity: -121dBm
  • Size: 50.4*39*7.6
  • Operating Temperature Range: -40~+85'C
Product Description



2pcs/lot  SV651  500mW  3km long distance Si4432 868MHz RS485 RF Transmitter Module


1. Descriptions:

SV651 is a high-power, highly integrated wireless data transmission module, using high-performance Silicon Lab Si4432 RF chip. Low receiver sensitivity, coupled with industry-leading output power of 500 mW guarantee expand the scope and improve the link performance. Module provides a multi-band multi-channel and network ID to reduce interference during transmission to improve the transmission performance. Users can modify the software or online via PC serial port settings and the RF parameters


 2. Features:

  •  433/470/868/915 MHz (Customizable 240-930 MHZ)
  •  Interface: TTL/RS232/RS485 ( Optional )
  •  40 channels
  •  4 bytes net ID
  •  2 bytes node ID
  •  Multiple air data rate
  •  GFSK modulation
  •  Bi-Direction communication 
  •  Parameters configurable
  •  Parameters saved even powered off
  •  Sensitivity: -121 dBm 
  • Max output power:500mW
  • Voltage:3.3~6.5V
  • Temperature:-40 ~ +85 °C 


3. Application:

  • Remote control telemetry
  • Security system
  • Industrial data acquisition
  • Home automation
  • Wireless data communication
  • Access system
  • Robot control
  • Wireless PC peripherals





4.Block Diagram:





 5. Specification:

Note:High quality 3.3V LDO is integrated,and Pin CS / SET is 3.3V interface.TXD/RXD is also 3.3V for SV651-TTL




6.Application circuit 





7. Pin definition 




8. Mechanical Dimension




This wireless module matches kinds of antenna:    to learn antenna, please visit here:
8.Product Picture: 
SV651-Si4432 chip 500mW 433MHz
SV651-Si4432 chip 500mW 433MHz-2

Order List

2pcs SV651 modules 868MHz /RS485 interface
2pcs SW868-WT100 Rubber Antennas
1pc RS485nterface USB bridge board  
2pcs Connecting wire 

Payment details

We accept: VISA, MasterCard, Escrow

Packaging & Shipping

  1. Packaging: All sample packed in Yellow carton
  2. Shipping: Free shipping by China Post Registered Air Mail,If you need fast shipping like DHL,FEDEX,ARAMAX,EMS, Pls contact with seller or email Items will be shipped within 3~5 days after we receive the full payment.
  • We do not guarantee delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect how quickly your product is inspected.
  • If you do not receive item within 60 working days (10 weeks), please contact us to investigate the case.
  • Please note that buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. 
  • These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments




Company Information

We are a technology leading company, who has combined R&D, produce and sales. Our company focused on the application development of RF and sensor module, devoted to provide the most excellent performance RF and integrated digital sensor module to our customers. Meanwhile, we can customize the RF and sensor class ODM project as well.

Our services
  1. We appreciate your order and and we do our best to serve you.
  2. We offer an instant 7 days return policy (7 days after we receive the items).
  3. The returned item has to be in its original condition.
  4. We are able to refund your money without shipping cost.


  1. Your satisfaction and positive feedback are appreciated. Please leave positive feedback and 5 stars if you are satisfied with our items and services.
  2. If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback.
  3. We will do our best to solve any problems and provide you with the best customer services.
  4. For any question, pls feel free to contact us by  email or via  TradeManager.


Packaging Details
  • Unit Type: lot (2 pieces/lot)
  • Package Weight: 0.5kg (1.10lb.)
  • Package Size: 13cm x 10cm x 11cm (5.12in x 3.94in x 4.33in)
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Packaging Details
  • Unit Type: lot (2 pieces/lot)
  • Package Weight: 0.5kg (1.10lb.)
  • Package Size: 13cm x 10cm x 11cm (5.12in x 3.94in x 4.33in)
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