Amazon with UOOEA-US has the UooEA Bone Conduction Waterproof Bluetooth 5.1 Open Ear Headphones w/ 16GB MP3 Storage (Blue) for $90 - 20% off coupon (check "Apply coupon" box) - $27 off with coupon code 6AY63QG9 [Exp 5/22] = $45 with free shipping.