The next generation of bone conduction technology is what’s inside our lightest and most organically designed open ear headphones to date. We cut the bulk and used titanium everywhere possible to ensure they not only fit more securely but sound better too. Trekz Air are inspired by the demands of elite and aspiring athletes motivated by their music and their world. Specifications: Speaker type: bone conduction transducers. Frequency response: 20Hz~20KHz. Sensitivity: 100 ± 3dB. Microphone: -40dB ± 3dB. Bluetooth version: v4.2. Compatible profiles: A2DP, AVRCP, HSP, HFP. Wireless range: 33 ft (10m). Battery: rechargeable lithium ion. Continuous play: 6 hours. Standby time: 20 days. Charge in: 2 hours. Weight: 1.06 oz (30g). Color: Green