Bluetooth Music Earpiece Smallest What Bluetooth Earpiece Do I Need To Listen To Streaming Music Audio From My Phone?

What bluetooth earpiece do I need to listen to streaming music audio from my phone? - bluetooth music earpiece smallest

I just want a single handset, No. 2, so you can listen while I work. I bought the headset Motorola MOTOPURE H12 today (My 1st one) and do not seem to work. However, it seems that the phone is working well and is very small.