【Strong Signal, Anywhere】Our doorbell boasts a powerful 400m range in open areas, ensuring you're always in touch. Whether you're in the backyard, upstairs, or even in the basement, never miss a visitor again. 【Set Up in Seconds】Effortlessly mount the wireless doorbell transmitter to your wall using either the provided screws or adhesive tape. Enjoy hassle-free installation in less than a minute. 【All-Weather Performance】Our radio doorbell is dust and waterproof, enduring temperatures from -30°C to 70°C. It withstands harsh conditions while boasting extremely low power consumption for 1-3 years long-lasting battery life. 【Custom Sound, Flexible Modes】Enjoy precise control with 5 volume levels up to 110 dB, perfect for the hard of hearing or elderly. Easily switch between LED only or LED + ring modes and select from 55 melodies for personalized alerts. Your last settings are saved for uninterrupted convenience. 【Dependability Meets Excellence】Our wireless bell set is not just reliable, but backed by a commitment to exceptional customer service, available 24/7 to support you., Manufacturer: SURFOU