Over-ear DJ headphones with Bluetooth. Main Features: Type - Closed, dynamic. Driver Units - 40 mm dome type. Cable - 1. 2 m short coiled cable (1. 8 m extended length). What's in the box: HDJ-X5BT 1. 2 m Coiled cable (extended length 1. 8 m), 6. 3 mm stereo plug adapter (threaded type), USB charging cable. Specifications: Weight (without cable) 319 g. Sensitivity 104 dB. Frequency Range 5 - 30000 Hz. Impedance 32 Ω.