The BiiSafe Buddy is a Bluetooth 4.0-based smartphone accessory that is wirelessly connected to the phone. Made by BiiSafe USA Inc. of Dover, Delaware, the device has a single button. Pressing the button sends a location update to one or many contacts; pressing it longer sends an alert. The person’s whereabouts are displayed on a map view from the mobile device. Users can also set the unit to sound if keys or phone are about to be left behind. It can be carried on a keychain, attached to a wristband, or worn as a pendant.