♫ 【Perfect compatibility】100% Compatible with Sony WF-1000XM4 WF1000XM4 WF-1000XM3 .
♫ 【Safe and Reliable】Our Z55H Battery is 100% compatible with the original WF-1000XM4 battery and Complies with CE/FCC/ROHS/UL certified standards. It is 100% new from manufacturer and can support up to 1000 recharge cycles over the life of the battery
♫ 【RETURN AND EXCHANGE POLICY】Full refund for whatever reason within 30 days of purchase. Additionally, We offer product free exchange should battery become defective within one year.