Good product bad battery.
I had no problem with the seller, the product came in good condition without any visable defects.The problem is that the battery didn't work upon arrival, after I replaced the battery (it is not one intended for replacement and I tinker in electronics a bit), The headset work as intended.Because of the nature of the headset the battery is very hard to replace and not intended to be replaced by the average user. So while the product worked as intended after a battery replacement, many customers may get a headset that dosen't work because of this problem.