Juggler Music Sensor. This is an amusement-only prize. It is unopened and unused. Outer box dimensions (measured by hand): W20.5 x H16.5 x D3cm This is a magnetic sensor-equipped door alarm that attaches to windows and doors and alerts you with an alarm when they are opened or closed. 【Main Specifications】 ・Dial-type volume control ・Dimensions: Main unit / approx. W6.5 x H10.5 x D2.3cm, Magnetic sensor / approx. W1.5 x H5.6 x D1.8cm ・Weight: Main unit / approx. 73g, Magnetic sensor / approx. 25g ※ I do not know the installation and operation methods because it is unopened. Please understand. 【⚠️Caution⚠️】 ・It is not waterproof, so it cannot be used outdoors. ・This product is only of the quality that can be offered as an amusement prize. Although the package says "crime prevention measures," it does not guarantee the same level of crime prevention as commercially available door alarms. Please consider this after understanding and agreeing to this. ・We are not responsible for any direct or indirect damages caused by the use of this product. ・Please read the handling instructions carefully and use it safely. Since it is unopened, it will be delivered as is without any operational checks. We cannot be responsible for initial defects, so please consider this after understanding and agreeing to this. This product uses 2 AA batteries, but they are not included. Please arrange for them yourself. This was obtained from a crane game, so the outer box may have claw marks, dents, or tears. Please check the photos. If you are looking for a perfect product, please refrain from purchasing.