Westone UM1 Universal-Fit In-Ear Musicians’ Monitor Earbuds - $25

Westone UM1 Single-Driver Tru-Fit UM1 In-Ear Musicians’ Monitors INCLUDES: 1 pair Westone UM1 In-Ear Monitors, 3 pairs TRUE-FIT Comfort Foam Eartips, protective (hard side-zippered) carrying case, and cleaning tools.
TECHNICAL SPECS: The Westone UM1 features a full-range, single balanced-armature driver with 114 dB @ 1mW sensitivity, 20Hz - 16kHz frequency response, and an impedance of 25 ohms.