Spot Bluetooth module Bluetooth Modem - BlueSMiRF Silver WRL-12577 - AliExpress
INOR ICON-BT Bluetooth Modem | Instrumentation2000
Bluetooth Low Energy HART modem - 278
Amazon.com: MEE audio Connect Hub Bluetooth Transmitter/Receiver with Audio Pass-Through for TV/Home Stereo with 3.5mm Jack/AUX/RCA/Optical Input; USB Multi-stream Bluetooth Adapter for Dual Headphones/Speakers : Electronics
Modem con Bluetooth
SparkFun Bluetooth Mate Silver - WRL-12576 - SparkFun Electronics
Amazon.com: Aisidra Bluetooth Transmitter Receiver V5.0 Bluetooth Adapter for Audio, 2-in-1 Bluetooth AUX Adapter for TV/Car/PC/MP3 Player/Home Theater/Switch, Low Latency, Pairs 2 Devices Simultaneously : Electronics