Online Exclusive! Marley Jammin’ Collection. Integrated microphone with three-button remote on cable. The + and - buttons control volume, while middle button will answer and end calls on most smart phones. 8 mm performance micro speaker. FSC certified Sapele wood body. Recyclable aluminum. Recycled plastic strain-relief. Tangle-free, durable fabric cable. Noise-isolating, eco-friendly in-ear headphones.