Alkaline MO2 chemistry Voltage of 1.5V Capacity of 3.9ohm 4 pc blister pack LR6 batteries Super Alkaline Mercury-free Cadmium free Use with most sex toys Average of 350 minutes Dimensions: 13.5-14.5mm diameter, 49.2-50.5mm heightVoltage: 1.5VCapacity: 3.9ohm, 24h/d, 350 minutesManufacturer: PK Cell