Induction door bell is constructed using high quality industrial plastics into, no aging of materials, do not fade, corrosion-resistant characteristics, Qty 60 kcal/pieces. Induction door bell wireless installation design, reducing the trouble and expense of installation and accurate "same frequency with different code" technique, with anti-theft feature for homes, restaurants, factories, and other places of use. Induction door bell sound built-in dual stereo speakers, sounds very clear, blister card packaging, wholesale reference price negotiable, minimum order quantity is 1 or more.