Nano Size CSR BT4.2 Bluetooth Dual Mode Audio Modules For TWS USB Dongles FSC-BT901

Nano size CSR BT4.2 bluetooth dual mode audio modules for TWS USB dongles FSC-BT901 FSC-BT901 is a highly integrated bluetooth module with which BT4.0 Smart Ready device(with BR/EDR & LE support simultaneously). it feature a V4.2 baseband controller, flah memory, small form factor, and...

Product Details


Nano size CSR BT4.2 bluetooth dual mode audio modules for TWS USB dongles  FSC-BT901


FSC-BT901 is  a  highly integrated bluetooth module with which BT4.2 Smart Ready device(with BR/EDR & LE support   simultaneously). it feature a V4.2 baseband controller, flah memory, small form factor, and external antenna interface.


FSC-BT901 Main Points


1.Chipset : CSR8811, v4.0 bluetooth dual mode;
2.Product size: 10*11.9*1.7mm    Max Transmit Power: 8dBm
4.Coverage up to 50m(165ft),external antenna optional
5.Application: Audio Transmitter/Reiceiver, TrueWireless, ShareMe, Intercom system




Audio speaker,TWS,Share Me

Analogue and USB Multi-media Dongles

Healthcare Devices

Measurent and monitoring system

Industrial sensors and control

Asset tracking  Computing

Barcode and RFID scanners

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*Fully qualified Bluetooth 4.2/4.0/3.0/2.1/2.0/1.2/1.1

* Postage stamp sized: 10*11.9 *1.6mm

* Class 1.5 support(high output power)

* TWS, Share me function

* SPP,GATT, HID interfaces.

* USB 2.0 full-speed device/host/OTG controller.

* Network support

* MFI Certification 

* RoHS compliant.


Feasycom bluetooth dual mode audio modules FSC-BT901 Datasheet:



Model NumberFSC-BT901 

10*11.9 *1.6mm

Transmit Power8.5dBm
ApplicationWireless headphone and audio transmitter
TypeData+Audio+Network Application
OtherTWS, Share me
Bluetooth TypeClassic & bluetooth low energy module
supply voltage2.7-3.6V
ChipsetCSR 8811


FSC-BT901 Block Diagram


Bluetooth dual mode Class1.5 wireless bluetooth interphoneBluetooth dual mode Class1.5 wireless bluetooth interphone

 Bluetooth dual mode Class1.5 wireless bluetooth interphone



Things You Need To Know For Bluetooth Modules:


1 What is Bluetooth 4.0:

Bluetooth 4.0 is consists of Bluetooth Basic Rate (BR)/Enhanced Data Rate (EDR), High Speed (HS) and Low Energy (LE), Bluetooth 4.0 covers the Bluetooth 2.0,2.1,3.0 Versions. Nowadays, there are a lot of devices powered by Bluetooth 4.0, such as Bluetooth Earphone, Speakers, Vehicle Electronic Equipment, OBD, Printer, Barcode Scanner, Mobile Medical Device, Bracelet, Pedometer, etc.



2 What is Bluetooth 5.0:

Two times transmission speed compare with Bluetooth V4.2,Max Trans Speed can reach to 24Mbps.

Effective work distance can be 300m, 4 times of Bluetooth V4.2.


3 What is Bluetooth Dual Mode Module:

Bluetooth Dual Mode Module is a Single-Module Bluetooth Solution with Built-in Bluetooth Basic Rate (BR)/Enhanced Data Rate (EDR)/Low Energy (LE) Functions.


4 What is BLE Module:

BLE Module is a Single-Module Bluetooth Solution with Built-in Bluetooth Low Energy (LE) Function.


5 What are the Bluetooth Dual Mode Advantages:

There are two most frequently applied Bluetooth Profiles for the general data communication between Smart Device and Bluetooth Peripheral: BLE and SPP.


In iOS, SPP is Only Available after the Bluetooth Peripheral passed the MFi Certification, in view of the high cost and complex process of the MFi Certification, BLE is much good to use. In Android Camp, BLE is Only supported by Android 4.3 and later versions of the Android OS, this lead to the serious system fragmentation issues and make a lot of Android devices has the bad compatibility for the BLE, so SPP has a huge advantage for data communication in android.


In Summary, If one product need to support iOS and Android devices simultaneously, our Bluetooth dual mode modules are the best choice.

6 What is the transmission distance for Bluetooth Modules:

Class 2 : 10M                 Class 1:  100M


7 What is the transmission speed For Classic Bluetooth Module SPP & BLE 4.0

Under Ideal Condition:

SPP: About 80KBytes/s

BLE: About 8KBytes/s


(Remarks: When starts the audio transmission ,the transmission speed for both types will be decreased. When music on, BLE transmission speed is about 1~2KBytes/s )



Company Introduction:


Shenzhen Feasycom Technology Co.,LTD focus on the researching and developing of IoT (Internet of Things) products, including Bluetooth Modules, WiFi and LoRa Modules,Bluetooth Beacon, Bluetooth Beacon, etc. With more than 10-year experiences in the wireless connectivity, which ensure us have the capability for providing low-risk product development, reducing system integration cost and shortening product customization cycle to thousands of diverse customer worldwide.


Feasycom’s engineering and design services include:



APP Support

PCB Design

Development Board

Firmware Development

Depth Customization

Certification Request

Turn-Key Production Testing & Manufacturing


Our products and services mainly apply to Automotive, Point of Sale, Home Automation, Healthcare and Engineering, Banking, Computing, Vending Business, Location, Lighting and more.


Aiming at “Make Communication Easy and Freely”, Feasycom is dedicated to design and develop high-quality products, efficient services to customers, for today, and all days to come.



Bluetooth dual mode Class1.5 wireless bluetooth interphoneBluetooth dual mode Class1.5 wireless bluetooth interphone

 Packaging & Shipping


1.Material delivery will be arranged by DHL/UPS/Fedex/TNT/EMS,normally it will take 3-7 working days 

to arrive in most of the countries.


2.We can also help you ship the goods by air line, then you fetch the packet from your local airport ,normally it takes about 2-7 days.


Bluetooth dual mode Class1.5 wireless bluetooth interphoneBluetooth dual mode Class1.5 wireless bluetooth interphone




Q1. Do you have any MOQ limit for an order?

No MOQ Limit, we welcome any client to purchase the sample for test purpose.


Q2: How to proceed an order?

Firstly, let us know your requirements or application. Secondly, we quote according to your requirements or our suggestions. Thirdly, customer confirms the samples and pay deposit for the official order.

Finally, we arrange the production and shipping. 


Q3: Do you accept Alibaba online orders?

Sure! We prefer to fulfill orders under Alibaba Trade Assurance system, since both parties will be protected.


Q4: Do you provide samples? Is it free or extra?

No, we are not offer the free sample, however once the order confirmed after sample approval, we will return the sample cost to you.