If there are problems with left ear drop outs, it is usually due to magnetic interference in the NFMI technology that we use to make the E8 true wireless. . This is not necessarily a defect but can be due to interference in the Bluetooth signal from other signals or products, or due to bad Bluetooth antenna on the source.
Truly wireless: enjoy superior sound quality and true cord-free convenience with these elegant Bluetooth earbuds. The wireless in-ear design delivers hassle-free listening with no strings attached.
Frequency response – 20 – 20,000 Hz and Impedance – 16 ohms