Techno features an abundance of percussive, synthetic sounds, studio effects used as principal instrumentation, and, usually, a regular, 4/4 beat usually in the 130–140 bpm range - sometimes faster, but rarely slower. Some techno compositions have strong melodies and bass lines, but these features are not as essential to techno as they are to other dance genres, and it is not uncommon for techno compositions to deemphasize or omit them. Techno is also very DJ-friendly, being mainly instrumental, and produced with the intention of being incorporated into continuous DJ sets wherein different compositions are played with very long, synchronized segues. Although several other dance music genres can be described in such terms, techno has a distinct sound that aficionados can pick out very easily.