D1-U8

技术参数：
– RX BT8931/BT v5.4
– Speaker Driver: 40mm
– Hybrid ANC
– Low latency 30mS
– Battery capacity: 400mAH
– Charging time: 2.5 hours
– TX BT8818U/BT v5.4
– 1.41-inch display
– Battery capacity: 300mAH
– Charging time: 2 hours