The ATH-CK1W, however, maintains the ATH-C602W’s 40 mW maximum input power and 16 ohms impedance. The ATH-CK1W also features an ultra-compact and feather-light design, a carrying case, and interchangeable XS/S/M earpieces. In addition, the ATH-CK1W is available in several funky colors including green, orange, pink, purple, white, and yellow. The Audio Technica ATH-CK1W is priced at $29.95, a $10 savings from the slightly superior ATH-C602W.