Wireless Doorbell Chime 36 Sounds 150m 492feet Range Loud Bell
*Power by:  4 x AA Batteries (not included) , 1 x 12V 23A Battery (included).    * Each chime uses 2 AA batteries (not included).   * Remote control / receiver distance: approximately 150 meters or 492 feet (open area).    * Chimes have 36 sound types and an 'Off' switch.     ***** NOTE: * Use good quality alkaline battery for doorbells.  * Do not install this product in the sunny or rainy place.   * Please keep some distance between this product and the metal in case it affects the usage.  * The sender and the receiver use the same codes to match with each other.     * Package includes: 1 x Wireless remote control doorbells;   2 x Chime Receivers;   1 x 12V 23A battery