Bose Aviation X headset. I used this headset for both helicopters and airplanes. Dual plug airplane and single plug helicopter adapters included. Both GA and helicopter adapters are factory Bose adapters. This headset was returned to Bose and refurbished shortly before I quit using it. Also includes a new mic cover and an extra wool headband from Bose. $9.95 flat rate shipping to lower 48 only.