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By certification 
FSC-BT502
Product Describe:
FSC-BT502 is a small form factor, low power and highly economic Bluetooth radio module that allows OEM to add wireless capability to their products. The module supports multiple interfaces that make it simple to integrate into fully certified embedded Bluetooth solutions.
With AT+™ programming interfaces, designers can easily customize their applications to support different Bluetooth profiles, such HS/HF, A2DP, AVRCP, OPP, DUN, SPP, and etc. The module supports Bluetooth® Enhanced Data Rate (EDR) and delivers up to 3 Mbps data rate for distances to 10M.
The module is an appropriate product for designers who want to add wireless capability to their products.
Feature:
Bluetooth v2.1+EDR, Class 2
Profiles including HS/HF, A2DP, AVRCP, OPP, DUN, SPP, etc.
UART and USB programming and data interfaces
Small form factor
SMT pads for easy and reliable PCB mounting
RoHS compliant
APTX (optional)
Application:
Hands-free carkits
Wirelessspeakers
Car Audio
VOIP handsets
Intercom system
