- Versatile Wireless Doorbell: Enjoy adjustable volume between 0 to 120 dB and choose from 32 melodies. The memory function retains your last ringtone and volume setting, even after a power outage, ensuring a hassle-free experience. - Long-Range Signal: With a remarkable wireless range of up to 300 meters, this doorbell provides reliable performance in large homes or buildings. You’ll hear your visitors from anywhere, whether you’re in the attic or basement. - Weather-Resistant Design: Rated IP55 for waterproof protection, the doorbell can handle extreme weather conditions (-4 °F to 140 °F). Its low power consumption and CR2032 lithium batteries offer a long lifespan of up to 3 years, minimizing the need for frequent replacements. - Visual Alerts for All: The 7-color LED indicators on the plug-in receiver flash whenever someone presses the doorbell, perfect for those with hearing impairments or during times when sound may not be ideal. You can easily mute the sound and rely on the LED notifications. - Expandable System: The cordless doorbell can be customized and expanded with up to 20 different transmitters, each with its unique ringtone. This feature is especially useful for multi-entrance homes or offices, allowing you to identify which door your visitors approach. Use Cases: 1. Ideal for large homes where you may be in a different room and need to ensure you don’t miss any visitors. 2. Perfect for offices with multiple entrances, providing a clear indication of which door is being used by guests. 3. Great for outdoor areas that require a weather-resistant doorbell, ensuring reliable performance in any season. Explore doorbell accessories by searching "SECRUI" on Amazon to enhance your experience further.