Muzo Tech via Amazon offers Prime members the Meidong Wireless Bluetooth Noise-Canceling Headphones in Black, model no. E6ANC, for $45.99. Coupon code "O72MT4XT" drops it to $32.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.39.) That's the lowest total price we could find by $25 in any color. They feature a frequency response of 22Hz to 22,000kHz and up to eight hours of playback.