Typically operates on 3.4V to 6V DC or 12V depending on the specific integration version (often powered by a single lithium battery or a 12V adapter).
If you are working with this specific PCB version, here are the common ways it is used in the hobbyist community: Bk-m33-bt-v2.pcb
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. Typically operates on 3