- EASY INSTALLATION: Simply plug the receiver into an outlet and attach the transmitter to the wall with included double-sided tape. No complex setup required; works seamlessly without interfering with other devices. - LONG OPERATING RANGE: Enjoy a wireless range of up to 150 meters (490 feet). With a strong and stable signal, you can hear the chime clearly from different rooms or even on other floors, ensuring you never miss a visitor. - CUSTOMIZABLE RINGTONES AND VOLUME: Choose from 60 unique ringtones to personalize your doorbell experience. With 5 adjustable volume levels, you can set the perfect sound for your home, complete with an LED flashing reminder. - BATTERY-FREE DOORBELL: The transmitter requires no batteries; it generates energy simply through pressing a button. Eliminate the hassle of battery replacements while being environmentally friendly and energy-efficient. Use Cases: 1. Perfect for busy households where you need to hear the doorbell from any room or level of your home, ensuring visitors are never overlooked. 2. An ideal solution for offices or shops, helping staff stay alert to customer arrivals with customizable chimes that suit your business atmosphere. 3. Suitable for senior citizens or individuals with hearing impairments, as the adjustable volume and LED reminders enhance accessibility and awareness.