The Shokz OpenRun Pro 2 Wireless Headphones deliver premium sound with innovative bone and air conduction technology, ensuring comfort, safety, and performance. Designed for active lifestyles, these lightweight headphones provide an open-ear fit, crystal-clear audio, and long battery life, perfect for any workout or daily activity. Powered by DualPitch the OpenRun Pro 2 combines the high and mid range of bone conduction with the controlled bass of air conduction technology for a clear and powerful listening experience. A long 12 hour battery life and short 1 hour charge time make them a great choice for heavy listeners. Specifications: Speaker type: Air conduction speaker & Bone conduction speaker Frequency response: 20Hz-20kHz Speaker sensitivity: Air conduction speaker: 96dB 2.5dB Bone conduction speaker: 101.3dB 3dB Microphone sensitivity: -38 dB 1dB Bluetooth version: Bluetooth 5.3 Compatible profiles: A2DP, AVRCP, HFP Materials: Headphone: Nickel-titanium alloy, silicone, plastic Charging voltage: 5V 5% Frequency band: 2400-2483.5MHz Battery: Li-Polymer battery Continuous playtime: Up to 12 hours of listening time with a single charge Standby time: Up to 10 days Charging time: 1 hour Quick charge: A 5-minute charge gives 2.5 hours of music playback Weight: Standard: 30.3 0.5g, Mini: 30 0.3g Warranty: 2 years Waterproof rate: IP55 sweat-resistant Battery capacity: 150mAh/0.581Wh Supported audio codecs: SBC Bluetooth range: 33ft (10m)