Wide Range Wireless Range- With strong wireless signals up to 500M in your home or business in an open area. The transmitter (button) has a strong penetrating power. You will never miss a visitor's arrival no matter where you are. Since the signal code of each wireless doorbell is different, it will not interfere with other devices in your house or neighbors IP55 Waterproof Design- The transmitter can work in temperatures between -10 to 60 (14F up to 140F). IP55 waterproof, the transmitter (button) can withstand the baptism of rain and harsher climates, you can put it outside the door. Visual signal- The receiver's circular LED light flashes, which leads to a ideal set up for the hearing impaired and seniors. Illuminated buttons help visitors find the doorbell at night and let you know if your doorbell is working 36 Chimes 4 Adjustable Volume- A total of 36 different ringtones, 4 adjustable levels from 0db to 115db, you can just choose your favorite melody you love the most and choose according to your habits and hobbies. Also can be used as a wireless paging device when in need Easy to InstallJust plug the plug-in receiver into the wall socket and fix the transmitter (button) on the wall. All necessary accessories are included in the package. XMASNEED Wireless Doorbell Set This doorbell set consists of 2 pluggable receivers and 1 portable transmitter. It helps you protect your home and family and is a must-have home accessory. It's ready to use right out of the box and fully paired. With the portable button, you can put it anywhere in your living room, kitchen, garden, garage, mailbox, office, school, nursing home, etc.