The KTM ETS Class 93 is an electric multiple unit operated by Keretapi Tanah Melayu on Malaysia's Electric Train Service intercity routes, introduced in the mid-2010s. Like most modern trains, it plays an automated warning chime and announcement before the doors close, a sequence railfans often record at stations. The clip circulates among train enthusiasts and video editors who want authentic door sounds for travel content. It stays useful because the chime is distinctive, cleanly recorded and instantly places the listener inside a Malaysian train carriage.