1. Easy Installation: These wireless home doorbells are pre-paired. No wiring or electrician needed, just plug the receiver into an outlet and it's ready to use. 2. Long Transmission Distance: Strong anti-interference and one-to-one signal pairing. No worries about signal interference. The transmission range can reach up to 918 feet in an unobstructed environment. 3. 38 Ringtones: Choose from 38 optional ringtones. The built-in speaker delivers rich, clear, and stereo sound. Features 4 adjustable volume levels. 4. Energy Saving: Crafted from premium ABS material with excellent fire and flame retardant properties. Utilizes standby sleep mode for extremely low standby power consumption. 5. Practicality: Can be set with a separate corresponding ringtone. Ideal for homes, villas, hotels, and factories. Can also serve as a pager for the elderly, sick, or pregnant women in emergencies. When you purchase our products, you not only get high quality but also the benefit of our thoughtful customer service. Our customer support team is always ready to provide you with help and support.