New Quality Wireless Door Bell 38 Melodies with LED Flash Light Easy to install For Homes, Offices, Factories, Hotels etc Remote control range up to 100 meters in open air, suitable for homes and high floor houses. Build in anti-interference design, avoid the interference between users. Build in double speakers, make sound clear, especially suitable for homes, offices, factories, hotels, etc Door Bell powered by 2 AA batteries ( not included ) 38 Melodies for selection, you can select your favorite. Easy to install, with double-side stickers at the back of the remote button LED Flash light indicator when visitor pressing the remote button. IP44 waterproof bell push. No wiring required