*40mm large-diameter compound sound unit * 30 minutes charge, 5 hours talk * bluetooth version 5.0 * can connect to 2 devices at the same time *3.5 mm audio interface * Support memory card insertion
1.40mm diameter compound sound.2.30 minutes charging, 5H on phone.3.BT5.0, connected to two devices at the same time.4.with 3.5mm connector, 3.5mm aux cable .5.memory card supported.
