Standard Bluetooth Class 2 operation, typically providing a range of up to 10 meters (33 feet). Frequency: Operates on the 2.4 GHz frequency band.
The designator refers to a widely integrated, low-power Bluetooth audio receiver and amplifier printed circuit board (PCB) . It is found extensively in commercial consumer electronics—such as wireless headsets, portable Bluetooth speakers, retrofitted car audio systems, and custom DIY audio installations. Bk-m33-bt-v2.pcb
For technicians repairing devices with this board: Standard Bluetooth Class 2 operation, typically providing a
Comprehensive Technical Deep Dive: Understanding the Audio Architecture Standard Bluetooth Class 2 operation