This was one of the reasons I went with Mercury as you can buy their filter ones but then upgrade them by using peltor electronic modules if they go wrong/lost its simple to replace. Had mine a couple of years ago and been fine and just charge them via usb on way to shooting grounds.For anyone wanting to go down the path of in ear electronics, I 100% would not reccomend Custom Fit Guards. They are an unreliable product and CFG will not support you. All repairs after the first year are chargeable regardless if you've had a replacement or repair that is less than a year old.
I can't speak for CENS but I will be going with CENS next time round.
First negative feedback I have heard for CFG but I would say passives for me from them so not a lot to go wrong.
I went there from CENS whose customer care, from my own experience, is no better. The CENS experience was the main reason I was put off the electronic ones and overall I now have real reservations about the longevity of the electronics in the modules and the cost of them initially - whatever the brand.
When Swatcoms are so robust and reliable there has to be a good reason to not us them and the knocking on the stock is the only that comes to mind.
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