RioRand&reg; A9 Mini Wireless GSM SIM Card PIR MP. Alert Infrared Sensor Motion Detector Alarm Anti-theft Motion Detection Anti-theft Alarm System Audio Monitoring Positioning, US AC/DC Adapter Powered by RioRand Advanced Technology Infrared sensor alarm. When people get close to the alarm; it will detect the signal and activate the alarm. Audio monitoring, clear voice. After binding this device with your phone, it will call you when it alarms. Positioning. You can send message "DW" to SIM card number, and if the alarm is moved, it can send you its new address to you. Remote control. You can turn on or turn off its sensing function by sending message to its SIM card number. Suitable for use in home, children's bedroom, office, hospital, car, storage, etc.