Never miss a visitor again with this PHYSEN wireless doorbell system! The kit includes 2 push buttons and 2 receivers, giving you coverage for multiple doors or different areas of your home. With a massive 1300-foot range in open areas, it works perfectly for large houses, offices, or even classrooms. Choose from 58 different melodies and adjust the volume from 0-110 dB - perfect for everything from sleeping babies to hearing-impaired family members. The LED strobe light provides visual alerts too. Installation is tool-free - just use the included double-sided tape or screws to mount the waterproof buttons, plug in the receivers, and you're done. The system remembers your settings after power outages and you can expand it by adding more PHYSEN components. The buttons operate in extreme temperatures from -4°F to 140°F and are completely waterproof. Whether you need to hear the doorbell from your backyard workshop, want different chimes for front and back doors, or just want a reliable wireless solution, this system delivers professional performance at a very reasonable price.