Feature:1. Dual Way Comm: This kit includes 2 door bell system units that can switch between ringtone calling and intercom mode. The working frequency is 410490MHz, with a wide range of applications.2. Indicator Light: The wireless voice intercom system adopts a humanized design, equipped with intercom light and power light, ensuring that users are clear at a glance and respond quickly to information.3. Long Distance: The transmissing distance of wireless voice intercom equipment can reach 1000 meters in open space and 20 to 50 meters through wall, with strong practicality and high reliability.4. Easy Adjustment: The portable voice intercom system has 2 channels A and B, and 3 volume levels, which users can adjust according to their preferences to meet various different needs.5. Wide Application: This dual way voice intercom system has clear sound quality and is suitable for different application scenarios, including homes, hospitals, hotels, laboratories, and factories, etc.Specification:Item Type: Wireless Home Intercom SystemMaterial: ABSWaterproof Rating: IP54Indoor Unit Battery: Rechargeable Lithium Battery 3.7V 1800mAh (built in)Outdoor Unit Battery: Rechargeable Lithium Battery 3.7V 1800mAh (built in)Application: For Home, Office, Laboratory etc.Working Temperature: -20 to 55Transmissing Distance: Open Space Approx. 1000 meter / 3280.8ft; Through Wall Approx. 20-50 meter / 65.6-164ftWorking Frequency: 410MHz-490MHz.Package List:1 x Indoor Unit1 x Outdoor Unit1 x Base1 x USB Cable1 x DC Power Cable1 x Screwdriver1 x User Manual