The Tronsmart Soundfii R4 are wireless headphones with a futuristic design that enable particularly clear calls even in noisy environments. Equipped with ENC technology, they eliminate background noise for clearer conversations in crowded places. The 12 mm titanium driver delivers deep bass and clear highs, contributing to a balanced sound. The ergonomic design and customizable ear tips ensure optimal comfort and stability, making them ideal for sports activities or long-distance travel. The headphones boast an impressive battery life of up to 28 hours thanks to the built-in 400 mAh battery, with the earbuds alone offering up to 7 hours of playback time. Operating all functions is straightforward. The Tronsmart Soundfii R4 supports Bluetooth version 5.3 and offers a working range of up to 10 meters. Additionally, they feature an IPX4 water resistance rating and come with a USB-C port. The package includes two extra pairs of ear tips and a USB cable to meet the needs of various users. Overall, they are lightweight and made from durable plastic material for everyday use.