,Compatible with Sony Headset Battery for WF-1000XM4()+with Installation Tools Kit Z55H

100% Compatible with original battery. For battery part number: Z55H Battery Voltage:3.85V Battery Capacity:70m Ah Compatible for WF-1000XM4 Warranty: Rest assured with 60 days Refund and 12 months Warranty;24 x 7 email support.