Shenzhen Realbell Electronic Co., Ltd. Is manufacturer , specialized in Doorbell . We have battery doorbell, wireless doorbell and WiFi doorbell . Realbell is our brand which adopted Hi-Tech mould ,advanced surface finish .All the doorbells are coming with fashion appearance, good quality , easy installation and easy operation . The superheterodyne learning code offers free match function . That to say one transmitter can work with many receivers; one receiver to many transmitters;or many receivers to many transmitters . Which are widely used in home , office , hotel,restaurant and hospital . "Innovation changes industry , innovation changes world"Which is our guideline . Realbell starts with innovation and based on innovation . Quality is primary , Customers are first" which is our principle . We are having got much reputation from customers in America , Europe , Asia and etc .