ELPA [Recommended by the Principal of the Japan Security School] Window Pita Alarm - Shock Detection Type

【Power Type】Coin Lithium Battery
【Battery Type】Lithium
【Noise Level】90 decibels
【Lens Mount Type】Window Mount
【Sensor Technology】Contact Sensor

● The impact detection type only detects glass breakage/impact, so there is no need to worry about false alarms due to rain, wind, or vibrations from opening/closing windows. ● When impact or breakage of the window glass is detected, a loud alarm (approx. 90dB/50cm) will sound for about 25 seconds. ● The main unit is only 8mm thick, so it will not interfere with the opening and closing of most windows. ● Large, easy-to-operate slide switch allows you to see at a glance whether it is armed/disarmed. ● Easy installation with the included double-sided tape. ● Can also be installed on frosted glass (glass with a textured surface). Note: Some decorative glass with significant unevenness may not be installable.

I purchased this on Amazon, but it was different from what I expected.
I couldn't return it, so I am listing it here.
The box has only been opened, and it has not been used.

The outer box is slightly torn, but there are no scratches on the contents.

This price is for 2 boxes, with 4 units per box.