LFMY Direct via Amazon offers the ZesGood Bluetooth Sleep Eye Mask Headphones for $24.99. Coupon code "P8BZTXRS" cuts the price to $12.49. With free shipping for Prime members, that's $13 off and the lowest price we could find. It is adjustable and features Bluetooth 4.2 connectivity, a microphone, and over 8 hours of playback time on a single charge.