Dww-(Pack of 2) Portable Wireless Voice Intercom, Indoor Doorbell, Home Security System, Indoor/Outdoor Intercom

[Occasions for use] Residences, factories, hotels, hospitals, tea rooms, shops and public places.[Operating Principle] When it is necessary to press the outdoor unit first: a. If the indoor unit does not press the intercom button, it will continue to ring. b. You will only be able to make an intercom call after pressing the intercom button on the indoor unit. functionality:1. The frequency of use of this product complies with national regulations, does not produce harmful electromagnetic interference and is universally applicable.2. The outdoor unit's battery is easy to install and remove. It operates on 4 AA batteries and uses a USB port for the indoor unit.3. The outdoor unit has a long operating time and the 4 batteries can last more than six months.4. The speaker is loud, the volume can be adjusted, and the ringtone can be changed. The intercom has clear sound quality and can be used as a mobile intercom.5. Long working distance, the maximum open distance is 300 meters.6. Easy to install, stick directly to the wall with 3M adhesive.7. By learning the code, an outdoor unit takes control of N indoor units without interfering with each other or changing the codes.8. Exquisite, compact, beautiful, and high-quality. Size: 100 x 60 x 14.8 mmDoor unit:[Voltage range] Powered by one AA batteryOperating temperature: -20-55 degrees[Transmission distance] 300 meters in open spaceOperating frequency: 467.6375 MHz.[Working hours] More than six months[Waterproof rating] No waterproof functionIndoor unit:Voltage range: USB powered.Operating temperature: -20-55 degrees[Transmission distance] Obstacles 50-100 metersOperating frequency: 467.6375 MHz.Working hours] 48 hours[Waterproof rating] No waterproof functionInstallation notesDoor unit:1. Remove the battery cover2. Install 4 AA batteries in the direction shown in the image above.3. Close the battery cover4. Press the intercom button. If the button's indicator light is on, the machine is working correctly. If the button's indicator light is not on, the battery is not installed correctly.5. Tighten the screwsIndoor unit:1. Turn the power switch to the ON position2. Press the intercom button and a "beep" will sound, indicating that the machine is normal. Coding:First, press and hold the indoor unit while turning on the power switch for 5 seconds, then release. The button's indicator light will flash rapidly and enter code-matching mode. Then, press the outdoor unit several times.When the button on the indoor unit flashes rapidly and then goes out, this indicates that the code matching was successful.The coding method for N inner units is the same.Low battery reminderExterior door operator - the button indicator light is flashing slowly. Please replace the battery immediately.Indoor unit: The button indicator light is flashing slowly. Please charge in a timely manner.It is recommended to keep the indoor unit charged after use.installation methodInstallation method for double-sided sponge adhesiveProduct list: 1x outdoor unit, 1x indoor unit, 1x screwdriver, 1x instruction manual, 1x double-sided adhesive tape, 1x charging cable