1.Audio Material:PVC Plastic + MDF Board 2.Product Color:Black+Fabric 3.Program Specifications:BT IC :MVSILICON/BP1082 BT Version5.2 receiving distance 10M 4.Product Features:BT TWS 5.Battery:18650/7.4V 6000mAh 6.Frequency Response:80HZ-20KHZ Sensitivity 500±50mV 7.Bare Metal Size:460*330*47mm