Bluetooth 4.2 with AAC codec wireless connectivity
Speaker: Electro-dynamic, 5.7mm diameter; Frequency response: 20Hz - 20,000Hz
Omnidirectional built-in microphone for calls and voice control
Transparency Mode: Select between four different levels of transparency to let in or out the sound of your surroundings
Rechargeable Lithium-ion battery: Up to 16 hrs (4 hrs per full charge)
Comes with a Qi wireless leather charging case