Brassiere strap groove is a common aesthetic deformity in women with breast hypertrophy. resulting from chronic pressure exerted by brassiere straps on the soft tissues over the trapezius muscle. causing local tissue depression. This condition is typically treated with fat grafting. https://www.roneverhart.com/Behringer-UL-1000G2-Wireless-In-Ear-Monitoring-System-US-584-to-608-MHz-p31393/