Two-way finding helps locate smart phone or spot pro device featuring Bluetooth® 4.0 technology. Attach the Spot Pro Finder to keys, purse, etc. 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. Free App for IOS and Android devices. Includes faux leather strap and round metal carabiner.