Smart Door Block Anti-Theft Alarm Device Travel & Business Accommodation Security Anti-Theft Device

1. Material: ABS plastic 2. Power supply: 1 x 9V battery (not included) 3. Stable performance and rapid response 4. Simple operation and easy installation 5. With silica gel on the bottom, strong friction and not easy to push 6. Increase the loudspeaker, 120bD high volume 7. Weight: 130 grams 8. Size: 14x4.5x3.8 cm