You can use voice instructions with turn-by-turn navigation. Voice instructions are offered in a variety of languages which are available through downloadable text-to-speech (TTS) and pre-recorded voice skins. Pre-recorded voice skins provide basic maneuver instructions such as "turn right in 300 meters", while text-to-speech voices also support spoken street names, e.g. "turn right in 300 meters onto Granville Street".
You can check Navigation Voices for a list of the supported voices in HERE SDK.
Voice skins information and voice skins downloads can be managed through the voice catalog. The following section describes how you can use the voice catalog, download voice skins, and use a voice skin with turn-by-turn navigation.