[300M/1000FT WIRELESS SIGNAL]: Strong penetration performance, the receiving distance can reach 300 meters/1000 feet, it can be widely used in home, office, apartment, villa, hospital, warehouse, etc. Besides, it can also be used as nursing equipment for the elderly or patients; [WATERPROOF DESIGN]: Can prevent rainwater intrusion and effectively extend the product life; [60 Melodious Chimes & 5 Adjustable Volumes]: 60 different ringtones allow you to freely change the ringtone. 5 adjustable volumes for you to adjust, meet your different needs; [ANTI-INTERFERENCE & NO CROSSTALK]: Digital circuit design, multiple sets of use will not cause crosstalk. Effectively avoid the problems caused by mutual interference between neighbors; [SUPER EASY INSTALLATION]: Two ways to install the push button, stick it with adhesive tape or fix it with screws and anchors. The package includes both double-sided adhesive tape and the screws needed for installation;