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CSR8670 TrueWireless Audio Bluetooth Module FSC-BT803

CSR8670 TrueWireless audio bluetooth module FSC-BT803 FSC-BT803 is a perfect 4.0 dual-mode module that supports HSP/HFP, A2DP, AVRCP, PBAP, SPP, GATT,etc. This module based on CSR8670 which integrates a RF Baseband controller, an ultra-low-power DSP, an application processor with embedded flash...
Product Details:

CSR8670 TrueWireless audio bluetooth module FSC-BT803


FSC-BT803 is a perfect 4.0 dual-mode module that supports HSP/HFP, A2DP, AVRCP, PBAP, SPP, GATT,etc. This module based on CSR8670 which integrates a RF Baseband controller, an ultra-low-power DSP, an application processor with embedded flash memory, a high-performance stereo codec, a power management subsystem and LED and LCD drivers in a SOC IC. It is very small and thin so the designers can have better flexibilities for the product shapes.


 FSC-BT803 Main Points

1.Chipset: CSR 8670. Bluetooth 5.0, Bluetooth dual module
2.Product Size: 13*13*2.0mm, Coverage up to 15m(50ft).
3.Max Transmit Power: 10 dBm
4.Support HFP, A2DP, AVRCP, SPP, HID and GATT;
5.Application: High quality headsets, wearable device, audio transmitter & receiver




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

* Postage stamp sized: 13* 13 *2mm

* Low power.

* Profiles support: HSP/HFP, A2DP, AVRCP, PBAP, SPP, GATT,etc.

* The default UART Baud rate is 115.2Kbps and can support from 1200bps up to 921Kbps.

* UART, I2C, PCM/I2S, nine PIOs, two AIOs.

* Stereo codec with 1 channels ADC and 1 microphone inputs.

* Support for CSR's latest CVC technology for narrow-band and wideband voice

* Support APT-X, TWS.

* MFI Certification 

* RoHS compliant.



* High quality headsets
* Wearable Devices
* Wireless sound bars
* Bluetooth speakers

* Audio transmitters

* TWS(or share me) device

* Multimedia players

* Car audio

* VOIP handsets

* Intercom system


CSR8670.jpgPostal Stamp Size.jpgTransparent Data Transmission.jpgSmart Home.jpgTWS .jpgShare Me.jpg



Feasycom FSC-BT803 Datasheet :



Bluetooth Specification







BT Standard

Bluetooth® V4.0 specification

RF TX Output Power

10dBm (Max)


-85dBm at 0.1%BER

Frequency Band

2.402GHz~2.480GHz ISM Band

Baseband Crystal OSC



1600hops/sec, 1MHz channel space

(BT 4.0 to 2MHz channel space)

RF Input Impedance

50 ohms

Major Interface

*Microphone: Input (Differential)

*Speaker: Output (Differential)

*UART: Tx/Rx







 GATT(BLE Standard)

Voice Processor

80MIPS Kalimba with cVc support


Supply Voltage

VBAT=4.2V MAX ;  3V3_INPUT=1.7~3.6V Volt DC

Working Current

Depends on profiles

Standby Current


Operating Environment


-40ºC to +85ºC


10%~90% Non-Condensing


RoHS Compliant



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 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.


3 What is BLE Module:

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


4 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.

5 What is the transmission distance for Bluetooth Modules:

Class 2 : 10M                 Class 1:  100M


6 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

Feasycom focus on the researching and developing of IoT (internet of things) products, including Bluetooth Modules, WiFi and LoRa Modules, 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.


Feasycoms 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.




 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.






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.


If you're interested in the csr8670 truewireless audio bluetooth module fsc-bt803, please be free to wholesale the quality products with our professional manufacturers and suppliers. The good after-sale service and fast delivery are available.
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