This ABS round Bluetooth anti-lost device is tech-savvy and practical, solving daily item loss issues. Compact, skin-friendly and anti-slip, it comes with a lanyard hole and accessories, suitable for various scenarios. The battery is easy to replace, compatible with iOS/Android. Available in multiple colors and customizable, it works well as an accessory or gift, helping bid farewell to the trouble of losing things. 1 1/2" L x 1 1/2" W x 0 3/10" H