Microphone Type: Omnidirectional Frequency response (microphone): 50Hz - 4kHz Sensitivity (microphone): -40dB (1VPa, 1kHz) Easy adjustment, soft headband and earpads Driver Diameter: 45 mm Frequency response: 5Hz -40kHz Maximum Input Power: 1500 mW Sensitivity: 102 dB / mW Resistance: 50 Ohm Communication system: Bluetooth® version 4.1 Bluetooth Transmission Band: 20 - 20,000Hz Exit: Power class 2 Compatible Profiles: A2DP / AVRCP / HFP / HSP Support Codec: SBC / aptX / AAC 3.7V lithium battery type Battery life: 38 hours Removable connecting cables Gold plated plugs Included: 1 x 1.2m cable with microphone and volume control, 1 x USB cable for charging, Carrying Case Available in black and white Weight: 185gr