Long Range & Strong Signal: Up To 300 Meters Radio Range And 58 Different Signal Tones, Including Many Well-Known Melodies The Signal Can Penetrate Obstacles Very Well This Wireless Doorbell Can Be Used In Apartments, Buildings, Offices, Business Premises Or The Garden Different Tones & Volume - With Selector Switch On Each Door To Choose Your Individual Favorite Tone From 58 Different Wonderful Melodies In Addition, The Wireless Doorbell Has 4 Adjustable Volume Levels To Meet Your Different Requirements Flashing Signal For Noisy Environments: In Addition To The Ringtone, An Isual Signal Also Appears When The Radio Bell Rings, Which Can Give You An Isual Form Of Notification, A Great Feature For The Hearing Impaired Waterproof And Weatherproof: Thanks To The Ip44 Weatherproof Technology And The Operating Temperature Between -30C To 70C, The Wireless Doorbell Is Suitable For Outdoor Use The Radio Bell Withstands The Harshest Weather Conditions Easy Installation: Simply Plug The Mini Bell Receiver Into A Socket And Install The Transmitter On The Wall Or Door Frame Using The Screws Or Adhesive Tape Supplied Either You Are Cooking In The Kitchen Or In The Garden, This Wireless Radio Bell Will Inform You In Good Time Never Miss A Visitor