[Strong Signal, Everywhere] Our doorbell offers a powerful range of 400 meters in open areas, ensuring you always stay connected. Whether you're in the garden, upstairs, or even in the basement, you'll never miss a visitor again. [All-Weather Performance] Our radio doorbell is dustproof and waterproof, supporting temperatures from -30 to 70 degrees Celsius. It's built to withstand harsh conditions while boasting extremely low power consumption. [Personalized Sound, Flexible Modes] Enjoy precise control with 5 volume levels up to 110dB, suitable for the hearing-impaired or elderly. Easily switch between LED-only or LED + Ringtone modes, and choose a personalized alert from 55 melodies. Your last settings will be saved for your convenience. [Reliability Meets Excellence] Our wireless doorbell set is reliable and backed by dedicated customer support available around the clock. Color: Black Material: ABS Package Contents: 1 x Transmitter (3 x AA Battery Not Included) 1 x Receiver Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.