- With the advanced Bluetooth 5.2 tech and the premium lithium battery
- Built-in microphone allows for hands-free phone calls
- Auto shut off - Setting a sleep timer on the mask 30, 90, 120 min(preserve battery life)
-Free of distracting beeps or flashing lights. -When the battery runs out, the sleeping earbuds will turn off automatically instead of beeping a warning and waking you during the night.