A:AnswerHello Daniela,
Our robots that are sold in North America do not come with Dual Voltage. If you are planning to use your iRobot product in another country, please check the voltage specifications printed on any accessory that requires voltage to operate.
A:AnswerRoomba 981 should have a run time of around 120 minutes. If the job is done in less, it will return preemptively. If you notice your robot is declining in performance, we would suggest following all the essential care procedures to clean and maintain your robot and if the functionality continues to decline, to contact our customer service.