Two-Way Finding Helps Locate Smart Phone or Spot Pro Device | Features Bluetooth® 4.0 Technology | Attach The Spot Pro Finder To Keys, Purse, Etc. | Includes Faux Leather Strap And Round Metal Carabiner | Find Mode Sounds An Alarm From The Spot Pro Device To Locate It | Tether Mode Can Send An Alert Before You Leave Behind Important Items | Connect And Manage Up To Four Spot Pro Devices | Replaceable Battery | Free App For IOS and Android Devices | The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Hit Promotional Products, Inc. is under license. Other trademarks and trade names are those of their respective owners.. Approximate Size: 3.47″ W x 1.65″ H , Imprint Area: 1 1/2″ Diameter