Waterproof Wireless Doorbell 300M Remote EU UK US Plug Chime Door Bell Alkaline batteryAA

Anti-interference system do not interfere with each other. Three levels of adjustable volume from 20db to 85db. There are 38 different chimes to choose from. Strong penetrating power, sensoring range up to 300m. Waterproof feature for reliable outdoor use. Descriptions: Made of premium material, flame retardant and safe for long time use. Wireless design for easy installation. Great for home, office, villa, hospital, school, factory, etc. Specifications: Power source: AC 100 - 240V Operation range: 300 meters in open area Melody: 38pcs Volume: 3 levels (20-85 dB) Battery type: 12V 23A alkaline battery Waterproof grade: IP44 Applicable temperature: -30°C to 70°C Material: plastic