I was really hoping that this would solve the issue of cords using a acoustic tube with my radio. By having the Bluetooth, you eliminate being tethered to cords. However even though it did work, the wound was more muffled then with other acoustic earpieces I have used in the past. I believe the issue is that the voice coil in the device is very tiny compared to others. I have returned this device, for this reason, hopefully this can be fixed in later versions.I did however find that Samcome has a Bluetooth that works on an earpiece, I am going to try that model.UPDATEI was contacted by SAMCOM support after posting my review. They were extremely helpful and offered to send me another unit. They are willing to work with me to resolve the issues that I encountered. The replacement unit worked perfectly, and the sound was clear. Their customer support is very high bar, and will continue to purchase items from SAMCOM.SAMCOME sent me a replacement surveillance earpiece. I didn't experience any distorted,or muffled sounds. The unit worked flawlessly, even in a noisy concert environment.The Bluetooth turns on and pairs within a second or two of turning on, and is bulletproof. I have never lost the Bluetooth connection once established. I can now highly recommended this unit.,I would not hesitate to purchase items from SAMCOME, as there support is above board. They responded immediately to my concerns and went above and beyond to insure my satisfaction. I would certainly order from them again, as they back their product.It is for this reason, i am changing my review to five stars.