MindKoo Electrons via Amazon offers the Mindkoo Cat Ear Headphones in four colors (Pink pictured) for $17.99. Coupon code "PQBLQZJJ" cuts the price to $12.59. Plus, Prime members receive free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $6.43.) That's the lowest total price we could find by about a buck. It features flashing LED lights, 20Hz to 20kHz frequency response, and up to 20-hour flash time.