I received a first copy which was not working in wireframe mode, the sound was weak and as if from the bottom of a very deep cave in Bluetooth mode against everything worked fine, thinking of a defective copy I held an exchange, the second had the same defect, so I ask the refund, Amazon as usual to set it in a big way. No further comments referring to this defect I still ask myself if the problem was not one of my devices and if the helmet is actually involved.
