We think the StarTech BT2A Bluetooth Audio ... Music Receiver appears to be functionally identical to the StarTech BT2A. When we opened both models, we found that they use the same circuit board ...

Ingenious little $89 Bluetooth receiver connects to any wired headphone ... the Periodic Neon consists of two boards sandwiched together with the Bluetooth, amplifier circuits, USB port and 3.5mm port ...