13,800 yen (tax included) Purchased new on Amazon and used for about 2 months, then removed as it was no longer needed in my environment. It has been carefully stored, and the operation has been confirmed to be problem-free and in good condition. Currently, it's the most popular item for theft prevention. You can find plenty of information with a Google search. AlterLock Gen3 | Anti-theft alarm GPS/Wi-Fi tracking device Bluetooth/LTE-M communication App integration | For bicycles, motorcycles, and vehicles | Small, lightweight, long operating time, waterproof and dustproof IP66 【Notes】A service contract is required to use the main functions such as communication outside of Bluetooth range and GPS tracking. (396 yen per month or 3960 yen per year) *Trial period available. *The price may differ for in-app purchases. 【Abnormal Detection Alarm】When abnormal movement is detected, a loud alarm sound of up to 95dB will sound to deter theft. You can adjust the detection sensitivity and alarm duration, making it suitable for various situations, and you can use it with peace of mind even in cycle racks. 【Communication Function】When the device detects movement, a notification will be sent to the app via Bluetooth for short distances and LTE-M / NB-IoT communication for long distances. It will notify you with a unique notification sound that you need to rush to the scene. 【GPS Tracking】In the event of theft, it attempts to identify the last location by receiving radio waves from GNSS (GPS & Galileo), Wi-Fi, and 4G base stations. Gen3 has improved the location information acquisition algorithm, achieving shorter positioning times and improved accuracy. 【Installation on Bicycles】It can be easily installed on the bottle cage mount of sports bicycles with the included security bolts. 【Installation on Motorcycles】For motorcycles, it is assumed that it will be stored in a place that avoids high temperatures, such as under the locked seat.