Brand : LuckramSpecial and pleasant sound of the doorbellBattery Operated : Yes (1.5V AA )Does not require to be attached to electric points, works on Batteries, you can install the remote buttons in one location. such as front door or back doorFlash light turns on when guest presses the remote buttonWith double side stickers at the back side of the remote button. very easy to installThe ultra-distance remote control (30 meters long) meets the need of various buildingsItem Weight : 100 GramsProduct Dimensions : 15 x 12 x 12 cmManufacturer : ?China