High-Resolution Lossless Sound Experience superior audio quality with these air conduction Bluetooth headphones. Designed to deliver lossless sound with high resolution, they provide an immersive listening experience Upgraded Bluetooth 5.2 Technology Enjoy faster, more stable connections with the latest Bluetooth 5.2 chip. This upgrade ensures seamless pairing with your devices, reduced latency, and improved overall performance Secure and Stable Fit The innovative back-hanging design ensures that the headphones stay securely in place, even during intense physical activity 240mAh Long Battery Life Equipped with a powerful 240mAh battery, these headphones offer extended usage on a single charge. Perfect for long workouts, commutes, or travel Lightweight and Comfortable Designed for all-day wear, these air conduction headphones are lightweight and ergonomically crafted for maximum comfort Specifications Bluetooth version V5.2 BLUETRUM 5616B Supported protocols Hands Free 1.6 Headset 1.1 A2DP 1.2 AVRCP 1.5 Channel system Stereo sound Talk time 7H Play time 7H Charging time 1.5H Charging bin capacity 240mAh Best talk distance Maximum transmission distance 8-10m Voice prompt Support Sensitivity 1033dB Speaker diameter 18mm Impedance 1815 Microphone parameters Sensitive bottom 395 Impedance 200Ω Bluetooth operating frequency 2.402G-2.480G Multi-point connection Not supported Wearing method Back hanging