Starting from Android 6.0 Marshmallow, Android requires location permissions (and location services enabled) to scan for Bluetooth Low Energy (or BLE) devices. According to Google, since it is possible to obtain your location information from the data broadcast by BLE beacons, apps that perform BLE device scans are required to request location permissions. The Human Headphones app scans for and connects to your headphones using BLE, but does not examine or record your location.
