Design: Over Ear, Driver: 40mm Neodymium, Active Noise Cancellation: 85% reduction of low frequency noise, Bluetooth Standard: 4.1, Bluetooth Chipset: CSR8645, Battery Type: Internal Lithium Polymer, Battery Life: 30Hr ANC Only, 15Hr Wireless Only, 12Hr ANC & Wireless, Impedance: 32 passive mode / 100 ANC mode, Sensitivity: (1mW@1KHz ±3dB): Passive 93dB ANC 103dB Bass 104dB, Frequency Response: 20Hz – 20kHz,Nominal THD: Passive <0.1%@ 1KHz / Active <0.5% @ 1KHz, Special Features: aptX & aptX Low Latency Support, Hands Free Calling, CONNECTORS: Input: 3.5mm Audio (Female), Power: USB Micro-B (Female)