... device;Or use external power supply transformer of DC "4.5V,300mA";Battery Stand-By Time: 30-45 daysABS Environmental Material,conform ... also provide a complete,one-stop service,with experienced and qualified personnel working with you step of the way,from Design,R ... part in any country.OEM & ODM are both highly welcomed. Motion Sensor Alarm Say "HELLO,WELCOM" While People Pass By