SURPLUS RESEARCH SR-002 V 3.1 (IN EAR MONITORS) Purchased from the official website! Limited quantity, extremely limited production, sold out immediately. Limited color earphone pouch included. Since it is new and unopened, I have not been able to confirm the operation. Please understand that returns are not accepted. Driver Configuration: Single Dynamic Driver + Double Balanced Armature Drivers Impedance: 20Ω Sensitivity: 105±3dB @ 1kHz Frequency Response: 20Hz–20kHz Cable Material: 4-Core Braided Silver Oxygen-Free Copper Cable Length: 120cm ± 5cm Cable Diameter: Main Cable: 3.5mm Branch Cable: 2.2mm Connector Type: 2 PIN (Detachable) Plug Type: 3.5mm L-shaped Protective pouch 100% nylon ripstop construction Zipper closure for secure storage 50 mm × 2 mm paracord puller for quick access Durable clip for attachment to bags, belts loop, or gear 3.6 in × 2.6 in Thank you!