I bought seven of these blue tooth wireless helmet headsets. I have not used them yet because my bikes are still in the shop but I have installed all of them and charged them all. They appear to function properly and I am very happy with this purchase.

works for what it needs to. it isn't a multi-channel, but for riding it is perfect. there is no app, just Bluetooth to it and set everything in place. i did have to pick up some adhesive velcro from my local dollar store, just because the mouth piece was missing the soft side for install...that and picking up multiples allows me to switch from my helm, to my bicycle face shield, and vice-versa. the audio quality from the mike is clear from what the people i call say, it's easy to pick up and hang up, i can listen to music, and everything i need. highly recommend for if you need solo safe-riding communication with your phone.

These same items are listed for sale on other sites (Facebook etc) for $80 plus.
Markabuoffers the same product for 1/3 the price!
Posted straight away and received fairly quickly.
I had no difficulty installing and using the audio headset and was very satisfied with the quality.
I opted to drill the holes and screw the headset to the helmet. No problems 👍

BT12 Motorcycle Helmet Headset Wireless BT Handsfree Headset Stereo Music Speaker Waterproof Support Automatic Motocross