Features 1、Beautiful music ringtone, sensor and receiver separation 2、The receiver is placed as needed 3、Strong sensitivity, no false alarm, anti-interference 4、Effective real-time monitoring of human movement within the monitoring range 5、Human body infrared automatic sensing, widely used in stores, homes, office buildings, factories and other occasions Specification Feature: Beautiful music ringtone, sensor and receiver separation. The receiver is placed as needed. Strong sensitivity, no false alarm, anti-interference. Effective real-time monitoring of human movement within the monitoring range. Human body infrared automatic sensing, widely used in stores, homes, office buildings, factories and other occasions. Specification: Condition: Brand New Material: ABS plastic Sensor operating voltage: DC 3V (2 * AA batteries, not including) Receiver operating voltage: DC 9V (1 * 9V laminated battery, not including ) Transmission frequency: 315MHZ Emission distance: 100 meters (in an unobstructed, undisturbed environment) Infrared sensing distance: 3-7 meters Music Ringtones: Classic Single (to Alice) Color: As Picture Show Package Weight: Approx 168g Package List: 1 x Sensor 1 x Receiver Note: 1. Not including batteries! 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.