This is a security alarm that emits a loud sound (approximately 130 dB). It is available in five colors: blue, purple, black, gold, and silver. If you would like a different color, please let us know in the comments. This product can also be used as a flashlight, and at this quality and price, we are confident that it is a super bargain. You won't find 130dB products even at discount stores, and even those with lower performance usually cost over 1000 yen. In an emergency, the louder the sound, the more likely a suspicious person is to panic and leave the scene immediately. This is a loud sound that I think will make anyone flinch. The sound is easy to activate: simply pull the pin on the right side of the main unit. To stop the sound, simply reinsert the pin. Please use it for your children's safety, especially for women's safety, as a security measure to keep at home, or for security when traveling abroad. It is also a must-have item for outdoor activities such as mountain climbing. In case something happens, it can be used to send an SOS signal, and it is also convenient as a flashlight!! It also has a mini light function. The fifth photo shows the light of this product. The sixth photo shows the light of a 100-yen flashlight. You can see that the light of this product is not inferior to that of a 100-yen flashlight. If you put it in your bag, you will find many opportunities to use it as a light. Main unit size: 6.8cm x 4cm x 2.3cm Batteries: LR44 batteries x 3 (Batteries are already installed in the main unit. The batteries will be activated when you remove the insulating sheet.) In addition to the English instruction manual, we will enclose an instruction manual with the important parts translated into Japanese. We will ship it wrapped in bubble wrap. If you would like to purchase multiple items, please let us know in the comments. 2 for 1200 yen, 3 for 1650 yen, and 4 for 1980 yen.