Muse 2 is a multi-sensor meditation device that provides real-time feedback on your brain activity, heart rate, breathing, and body movements to help you build a consistent meditation practice. Bluetooth-capable device!
You can read about it here: https://choosemuse.com/muse-2/?utm_source=google&utm_medium=cpc&utm_campaign=ToF_All_Search_Dynamic_Website&utm_term=--b&utm_content=All_Pages--419464376827&gclid=EAIaIQobChMIrPqL4Yaf6wIV2KiWCh2paA_GEAAYASAAEgLdNvD_BwE
Please note that this item is new but I've had it for a while; just never got around to using it. Comes with a carrying case.
Prefer pickup but can arrange a handover if the circumstances are good.