HQRP KIT: Universal General Use Battery Charger plus 4-Pack Batteries for Sennheiser RS110, RS120, RS130, RS160, RS170, RS 180, PXC 250-II, PXC 350, PXC 450, HDR 170 Headphones plus Coaster HQRP&reg; Universal Battery Charger plus 4pcs Ni-Mh AAA Battery HQRP&reg; Coaster; Battery Charger: Input voltage: 110-240VAC 50HZ; Use for: Ni-MH/Ni-Cd Rechargeable Battery; The maximum input power: 5W; Dimension: 111*71*51mm. Battery Voltage: 1.2V; Capacity: 900 mAh; Ni-Mh; Rechargeable 1000 Times. 200 days warranty!