The ZT PLUS Wireless BT Bluetooth Neckband Earphones. After a simple 10-minute charge, you may enjoy up to 20 hours of immersive audio playing. The flagship-level battery life provides up to 30 hours of continuous audio playback on a single charge. A massive 12.4 mm bass driver gives unrivaled depth for strong pounding. The titanium-coated dome provides extraordinarily rich audio detail at all frequencies. Anti-distortion audio technology keeps your audio playback smooth. Notes stay distortion-free because of the bigger sound cavity and industry-leading algorithms. The IP55-rated internals and design of the ZT PLUS Wireless BT Bluetooth Neckband Earphones keep it water and sweat-resistant