Mackie MP-240, In-Ear Headphones, Dual hybrid driver: 1 Dynamic and 1 balanced armature driver, Frequency range: 20 - 20,000 Hz, Impedance: 32 Ohm, Sensitivity: 94 dB +/- 4 dB @ 1 KHz, Ergonomically shaped low-profile housing, High fidelity cable with detachable MMCX connector, Colour: Black, Includes hard case, gold-plated 3.5 mm to 6.3 mm jack adapter, ear plugs in foam, silicone and with double flange in 3 sizes each, Suitable replacement cable: MP Series MMCX, article no. #449688# (not included), Suitable Bluetooth adapter: Mackie MP-BTA, article no. #480768# (not included)