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By certification 
FSC-BT821
Product Describe:
FSC-BT821 is a fully integrated Bluetooth module that complies with Bluetooth 4.0 dual mode protocols(BR/EDR/BLE). It supports SPP,HID,GATT,iBeacon profiles. It integrates Baseband controller in a small package(Need an external RF antenna), so the designers can have better flexibilities for the product shapes.
Feature
Fully qualified Bluetooth 4.0/3.0/2.1/2.0/1.2/1.1
Postage stamp sized form factor,
Class 1.5 support(high output power)
The default UART Baud rate is 115.2Kbps and can supportfrom 1200bps up to 921Kbps,.
UART, I2C,PCM / I2S data communicationinterfaces.
Support the OTAupgrade(optional)
Bluetooth stack profiles support: SPP, HID,and all BLE protocols.
Application
Health & Medical devices
Home Aotomation
Wireless POS
Measurement and monitoring systems
Industrial sensors and controls
Asset tracking
