Listen to 4U (HardTekk) online. 4U (HardTekk) is an Instrumental language song and is sung by TEKKCAT, TRANTEKK and HARTZERTEKK. 4U (HardTekk), from the album 4U, was released in the year 2025. The duration of the song is 2:06. Download Instrumental songs online from JioSaavn.