NILLKIN GO TWS Bluetooth headset, using Realtek 5.0 Bluetooth solution, MEMS digital microphone combined with DSP noise reduction algorithm, brings you quality audible sound. Equipped with 8mm customized dynamic driver, support clear stereo handsfree call. Ergonomic design with only 5g weight. 5 hours of continuous listening on the earphones plus 25 hours of backup from the charging case. IPX5 water-resistance and painless wearing design keeps the music playing through sunshine and rain.