NexTech Door Alarm

Gsm quad band network, lbs location
powerful tracking platform
247 protect you and your family safety
all commands can be set by app
smart door , independent host , without install
built-in 4-class adjustable sensitive vibration sensor
built-in precise opening and closing doors and windows sensor
built-in high sensitivity sound sensors
built-in high sensitive mic, voice monitoring
infinite distance alarm
low battery alert
up to 72 hours
sim changing alarm.