Long Range & Strong Signal - Up to 300 meters wireless range and 58 different ringtones, including many well-known melodies. The signal can pass through obstacles well. This wireless doorbell can be used in apartments, villas, offices, commercial spaces or gardens. Various Sounds & Adjustable Volume - With a selection switch on each doorbell to choose your favorite melody from 58 different melodies. In addition, the wireless doorbell has 4 adjustable volume levels to meet your different needs. Light Signal for Noisy Environments - In addition to the sound, a visual signal also appears when the wireless doorbell is pressed, providing you with a visual notification. A great feature for hearing impaired people. Waterproof and Weatherproof - With IP44 weatherproof technology and operating temperature range between -30°C and 70°C, the wireless doorbell is suitable for outdoor use. It can withstand the harshest weather conditions. Easy Installation - Simply plug the mini receiver into a