[. . . ] Make sure that your hands are dry when you insert or replace batteries. For the parent unit, charge the supplied rechargeable batteries as described in this user manual. To prevent battery explosion or leakage, which can damage the baby monitor and cause burns and skin or eye irritation: · Remove batteries if you are not going to use the product for more than 30 days, Keep batteries away from excessive heat such as sunshine, fire or the like, · Remove batteries as soon as they run out of power. [. . . ] Press to play the next lullaby Press to turn on or turn off the nightlight Model number: For UK, SSW-1920UK-2; For the other European countries, SSW-1920EU-2 Make sure that the parent unit is disconnected From the mains and turned off. You can connect the baby unit to the mains or insert non-rechargeable batteries to operate it. Before you connect the baby unit to the mains socket, remove the lid of the battery compartment. Insert the supplied rechargeable batteries with the correct polarity (+/-) as indicated. For the first 4 times, the charging time is 10 hours, Press and hold on the baby unit for two seconds. » The baby unit turns on, and all indicators on the baby unit light up briefly. 5 metres/ 5 feet away from the baby unit to prevent acoustic feedback. » The parent unit turns on, and all indicators on the parent unit light up briefly. It takes less than 15 seconds to establish the Link between the parent unit and the baby unit. When the parent unit is out of range of the Baby unit, the parent unit beeps from time to time. The battery indicator flashes red and a beep tone occurs 30 minutes before the batteries run out of power. » The link indicator flashes red and the parent unit starts to search for the baby unit. Outdoors: up to 260 metres/ 850 feet The operating range varies depending on the surroundings and other factors that cause interference. for interference from wet and moist materials , the range loss is up to 100%. For interference from dry materials, see the following table: Material thickness < 30 cm/12 in Loss of range 0-10% When you monitor your baby from a small distance, you can enable ECO mode. In ECO mode, the baby monitor consumes less energy, but still ensures that you can hear your baby clearly without any distracting noise. [. . . ] The rechargeable batteries only reach the full capacity after you charge and discharge them at least 4 times. For the first time or after a long period of disuse, the charging time is 10 hours. If the parent unit is sufficiently charged and there are batteries in the baby unit, the baby monitor continues to operate during a power failure. [. . . ]