In-ear earphones. Overtone EP-101M earphones represent new quality in their price range. Compatible with every smartphone or tablet with 3,5 mm CTIA/AHJ socket, this product was designed for people who like very well controlled, full bass, realistic, lifelike vocals plus detailed and smooth highs. Overtone EP-101M sound signature is very coherent; along with musicality there goes spaciousness and definition as well. This is our secret recipe for sound enjoyable all the way.