Brand Name Marshall Model 04091378 Model Name 04091378 Model Year 2016 Part Number 04091378 Additional Features Impedance: 64 Ohms, Sensitivity: 100mV@1kHz = 99dB SPL, Frequency Range: 10Hz-20kHz, 3.5mm/6.3mm Adapter Included Included Components Headphones Number Of Items 1 Microphone Form Factor Built-in Microphone Headphones Form Factor In Ear Are Batteries Included No Batteries Required No Battery Cell Composition Lithium Polymer Cable Feature Detachable Connector Type Bluetooth Includes Rechargable Battery No Includes Ac Adapter Yes Includes Remote No Supports Bluetooth Technology Yes