Built-in microphone for two-way conversation and audio monitoring. Whenever you use this baby monitor, you can talk to your baby anytime, anywhere. Made of high quality materials, it is corrosion-resistant, wear-resistant, durable and can be used for a long time. Easy to pair, plug and play. Sensitive, you can easily hear baby cry and inform your parents. When you are not near your child, our baby monitor is your best helper. Easy to pair, plug and play. Beginners can easily use the baby voice monitor without complicated setup. We use a digital approach with less interference. Small and round and cute design. As a gift for baby gifts, it is very popular. In addition to monitoring children, it is also used in a variety of situations, such as pets, elderly and transceivers. Specification: Condition: 100% New Material: ABS White Optional Plug Type: US US 100-240V, EU 100-240V, UK 100-240V, AU 100-240V Power supply voltage: DC 5V. Transmission frequency: ISM 2400-2483MHz Transmission power: 17dBm Modulation Type: FSK Baby unit power consumption: 70 mA. Paretn unit sensitivity: -85dBm Battery: 3 * AAA (NO.7) for each (Excluded) Working temperature: -10 ~ +60 Storage temperature: -40 ~ +70 Baby Unit Size: Appox 62 x 40 x 103 mm / 2.4 x 1.6 x 4.1 inches. Parent Unit Size: Appox 62 x 45 x 103 mm / 2.4 x 1.86 x 4.1 inches. Package Weight: Appox 347 g / 12.2 ounces. Package List: 1 x Baby unit. 1 x parent unit. 1 x AC adapter for the baby unit. 1 x AC adapter for parent unit. 1 x user manual in English. Note: 1. Remove the battery or power plugs when not in use for a long time. 2. Do not use an external power supply while using normal AA batteries in case of danger. 3. The rechargeable battery can only be 1.2V AA NiMH, please do not charge the battery to avoid reducing the battery life when not in use for a long period. 4. Please do not operate in high temperature and high magnetic field.