The DC PRO-2 passive headphones incorporate outstanding comfort features in a supra-aural, in-ear design. This lightweight yet extremely durable communication headset is designed for low noise jet aircraft. Note: As with any passive headset with an over-ear design, the DC PRO-2 is not recommended for fixed-wing piston-powered aircraft. The DC PRO-2 was designed for use in the commercial/transport jet market. Features: Extremely light but strong alloy headband and suspension; Dual volume controls provide independent listening levels in each ear; Adjustable suspension mount for a custom fit; Low-profile Outlast fabric head pad with ventilated design absorbs excess heat to keep you cool and eliminates 'hot spots'; Ultra-soft synthetic leather ear seals with Dura-Stitched seams, supra-aural (in-ear rest) design provide a custom fit and eliminate heat build-up for enhanced comfort; high performance. electret microphone to improve noise cancellation; 5 foot straight cord with dual plugs; Foldable design for compact storage in the David Clark brand headphone bag (included); weight (without cable assembly) 8 ounces. DC part number, 43106G-01