This is a device to prevent electrical fires caused by leaks, which automatically cuts off the power supply during an earthquake. It attaches to a household breaker. I removed it after one year due to moving. It has hardly been used, and all parts are included. It has been cleaned. To keep the package within a 3cm thickness, the box will be folded for shipping. ⬛︎Main Body Size (cm) 2.8 x 3.4 x 5.8 ⬛︎Features Compatible with various breakers, including built-in types. ⬛︎Purpose To prevent secondary damage from electrical fires during major earthquakes. ⬛︎Product Description Attaches to a breaker and reliably activates to cut off the power supply at a seismic intensity of 5 or higher (with adjustable activation range). ⬛︎Included Items/Set Contents String, switch hole threader, large and small seismic intensity adjustment rings (1 each) ⬛︎Materials ABS resin, iron ⬛︎How to Use Attach to the breaker and reliably activates to cut off the power supply at a seismic intensity of 5 or higher (with adjustable activation range). ⬛︎Country of Origin Japan ⬛︎Weight Approximately 105g Available for immediate purchase. Thank you for looking.