It's the most hospitable instrument for connecting people by Speech Visitor Chime.             Two different languages,user selectable.   Designed with dual high sensibility PIR detector,detect person's IN and OUT exactly.   It's available to use AC or DC power.   Bulit in chime & alarm two functions.

SIZE 193mm*115mm*61mm WEIGHT 330g POWER AA alkaline battery * 4 pieces / DC 9V adapter DETECTING RANGE 5M