【Regarding Performance Trade-offs】 
The Nank Runner Pro2, an upgrade to the iconic Runner Pro, offers high-performance, cost-effective swim earphones. Enhanced waterproof performance, lighter weight, improved Bluetooth capabilities, and increased memory. The microphone function has been removed.

【Bone Conduction Open-ear Design】Uses advanced bone conduction technology to transmit audio through cheekbones, ensuring authentic sound and awareness of your surroundings, ideal for outdoor sports.

【8-Hour Playback & Magnetic Charging】With a 230mAh battery, the Runner Pro2 offers 8 hours of playback at 60% volume and fully charges in 1.5 hours using magnetic fast charging.

【IP68 Waterproof Headphones】Certified IPx8 waterproof, resistant to sweat, moisture, and dust, suitable for indoor and outdoor sports, including swimming, snorkeling, and surfing.

【Wireless Headphones & MP3 Player】Bluetooth 5.3 for easy pairing with iOS and Android devices. Switch between Bluetooth and MP3 modes with double-click. 32GB memory stores ample music, allowing enjoyment without phones. (Pre-loaded with 3 test songs)

【Leakage Reduction Sound & Shocking Sound】Weighs only 32g, with a flexible, durable design that can rotate 360 degrees. Elastic silicone on the cheekbones ensures comfort and stress-free long-term wear.