The top-of-the-line SpotPro Key Chain is a terrific tech accessory for students, teachers, and volunteers to help locate their keys! Featuring BluetoothÂ® 4.0 technology, the 1.65" x 3.5" key chain includes a faux leather strap and round metal carabiner, and replaceable battery. Simply attach the key chain to bags, purse, etc., and press the button to activate the finder--you can connect and manage up to four spot pro devices and/or smart phone with accessory. When your phone gets too far away from this device, the device sends an alert to your phone! Add your choice of one-color imprint to the non-button side to customize your key chains especially for your school or event. Custom tech accessories, like this very handy finder are great Prom or Homecoming swag bags, Senior Night, or graduation gifts.