Hybrid in-ear earphones KZ ZSTX with a single 10 mm driver and a frequency response from 20 to 40 000 Hz. They use hybrid technology, connect via a 3.5 mm plug, have a detachable cable, an L-shaped plug and an ear-hook style with silicone pads. There is an inline control button and a built-in microphone; they are wired, not wireless, and not waterproof.