Uplift 2 is the latest model of The House of Marley in-ear headphones. An update to the very popular original Uplift model. The headphones are ergonomically designed for a comfortable and natural fit. The acoustics have been re-tuned to give listeners a more balanced, cleaner and clearer sound. As with all House of Marley products, the Uplift 2 is made from sustainable materials such as FSC®-certified wood, recycled aluminum and silicone. Features: 10 hours of playback Bluetooth® wireless connection Ergonomic shape for a comfortable fit Microphone and three-button control Braided cables with anti-entanglement protection Includes 3 sets of earplugs and a storage bag Materials: FSC certified wood ™ Recycled aluminum PLA – Bioplastics Specifications: Impedance: 16 ohms Frequency range: 20 – 20 KHz Speaker size: 9 mm