Adjustable sensitivity ,built in shock sensor back up battery,micrwave sensor ,accelerometer sensor 1. Six tone alarming 2. Power cut off alarm 3. LED indicator 4. Fully waterproof 5. Adjustable sensitivity ,built in shock sensor 6. Circuit protection for power supply 7. Built in backup battery 8. Built in internal power,microwave sensor ,accelerometer sensor Technology date:working voltage :9~15 ...