Shokz’s bassy OpenRun Pro 2 are $40 off thanks to a new Mother’s Day promo

The Shokz OpenRun Pro 2 come in a variety of colors, including a traditional black hue. | Photo by Victoria Song / The Verge If you’re looking to pick up a pair of open-ear headphones for yourself — or your mom — Shokz is running a Mother’s Day sale. Now through May 10th, the company’s best pair of bone conduction headphones, the OpenRun Pro 2, ar…