Review on Sony WIC400/L Wireless Behind-Neck In-Ear Headphones, Blue by Anastazja Kendziora- ᠌

Ordered for DR. When making my selection, the most important considerations were the soundproofing (since I take the metro) and how long the job would take. My opinion is that this is an excellent alternative for the price because there is no cord to the device that is doing the transmission, it can work without being charged for approximately a week, and it has the form factor of a plug. The interference causes the sound to be lost in the area close to the subway and train stations, sometimes for as long as a few seconds at a time. This is an annoyance. I can't say for sure because I haven't tested any other possibilities, but it's possible that these are issues with the Bluetooth protocol or with a particular model. You should also be aware of a feature that, for some unknown reason, when you are on a call (while using the headset), the sound from the microphone is transmitted to the ears. This means that you hear both your own voice and the noise in the environment (with some delay). It is not totally obvious why this action was taken. It is not possible to configure. In general, I could not be happier, and the value is unbeatable.