Longer Range -Up to 1000 Feet (300m) in the open air from the transmitter (150m if there are walls). Either you are occupied in the bedroom or at the kitchen, our wirele doorbell kit can remind you that someone is calling from outside. Never worry about miing visitors. 60 Melodies & 5 Levels Volume -The wirele doorbell offers a wide selection of 60 tunes for your choice. 5-level of volume range from 0dB to 110dB. Silent mode with just LED flash is available when you don't want to be disturbed. IP44 Waterproof -The doorbell push button is rated IP44 and weatherproof for outdoor use,the doorbell chime is suitable for any home, townhouse, apartment, office, school, hospital, hotel or other application. Easy to InstallThe wirele door chime has been matched before shipment. Just plug the receiver into a wall outlet, install the push button with provided double sided tape or screws. Receiver working voltage: AC 110V/220V. Expandable and High Quality -Expand your existing doorbell system with up to 8 transmitters and unlimited receivers. Our wirele doorbell is certified with CE, RoHs, FCC. Widely Application for the KS Home Doorbell The wirele doorbell kits can be used for a variety of applications, both at home and at the office! Did you know the new application of the wirele doorbell? Elderly or Patient Care:The push button can be used for emergency call for the eldely or patient. It is battery powered, easy to acce for them too. Morning Call for Children:Haled to get the children up in the morning for school? Don't worry, just pre the push button at your home, your kids will wake up on time, no longer late for school. Perfect for home, shop, office:With our wirele doorbell, you'll never mi a visitor. Distinguish front and rear doors (Requires at least 2 buttons) Used in large double or three-story house. You can program each button to a different tone so you know where your guests are. This is a very convenient feature for multiple doorway entries. All receivers to chime regardle of which button is pushed, but different tone for each door so we can tell which door someone was at.