The wireless signal can be transmitted up to 300 meters in an open space, providing reliable long-range performance even through multiple obstacles such as walls and doors. Choose from 36 CD-quality melodies with 4 adjustable volume levels ranging from 25dB to 85dB, easily selected by pressing the button on the receiver. The transmitter is built with high-quality materials and meets IP44 waterproof standards, ensuring stable outdoor performance in various weather conditions. A bright blue LED flash activates on both the transmitter and receiver when the button is pressed, providing a clear visual alert ideal for hearing-impaired users. Installation is simple: plug the receiver into any standard outlet and mount the transmitter on a wall or door frame using the included double-sided tape or screws. The receiver operates without batteries. This portable wireless doorbell kit offers a 300-meter range, blue LED notification, and 36 melodious chimes with 4 volume settings, making it a convenient and reliable addition to homes, offices, hotels, and other spaces. The unique frequency minimizes interference from other wireless devices. Package includes: 1 x Waterproof Transmitter (battery included), 1 x Receiver, 1 x Double-sided tape, 2 x Screws, 2 x Anchors, 1 x Screwdriver, 1 x User Manual. Note: Remove the insulating strip before use. Although the transmitter is weather-resistant, avoid direct exposure to sunlight and rain for prolonged periods.