🔔[24-Hour Time Display] Costar wireless door bell fits perfectly into a variety of home and office decor styles, and is equipped with a clear 24-hour time display that lets you keep track of what's going on at the door and the time at the same time 🔔[300 Metres Wireless Range] Costar calling bell wireless offers a remarkable wireless range of 1000 feet (300 meters) in open area. Whether it's a large spacious house, multi-storey flat, large office, shop or even hospital, it's easy to cover to make sure you don't miss any visitors 🔔[58 Customisable Ringtones and 5 Volume Levels] Costar wireless doorbell is equipped with 58 ringtones, ranging from crisp classic ringtones to stylish modern melodies, providing you with a wealth of personalised options. Meanwhile, the 5-level volume adjustment function allows you to adjust it flexibly according to different environments and needs 🔔[Easy Installation] Costar wireless door bell is designed for quick installation without wiring. Simply glue or screw the buttons with 3M adhesive and plug the receiver into a power outlet for a one-minute installation 🔔[Weatherproof and Versatile] Costar calling bell wireless is waterproof and dustproof to withstand harsh weather conditions and can operate in temperatures ranging from -10°C to 50°C. Its modern design and excellent materials make it suitable for a wide range of applications, including houses, townhouses, flats, offices, schools, hospitals and hotels