The FiiO FF1 earphones are not traditional in-ears, but rather earbuds. Earbuds rest in the outer ear rather than being inserted into the ear canal, which many music lovers find significantly more comfortable. Especially when lying on one side, earbuds do not cause pressure. Weighing only 3.2 grams per earphone, the FiiO FF1 is also exceptionally lightweight. A common drawback of earbuds is their often weak bass response. To ensure rich and powerful bass reproduction, FiiO has developed an Acoustic Resistance Pipe for the FF1, which enhances airflow and thus provides solid bass. The dynamic driver is generously sized at 14.2 mm in diameter, delivering an energetic and voluminous sound. The package includes six pairs of foam covers, which create different sound signatures: enhanced bass, balanced sound, or a transparent, finely resolved sound with a focus on the highs. The earphone cable is replaceable and features 2-pin connectors at both earphones. The 3.5 mm plug is compatible with many portable music devices, and to use the FF1 with smartphones without a headphone jack, a USB-C to 3.5 mm adapter cable is included. For those who prioritize a secure fit in the ear, the earphones can also be equipped with one of the three pairs of included anti-slip silicone rings. Thus, the FiiO FF1 is suitable for various applications: it does not press on the ear while lying down, ensures a secure fit during sports, and thanks to the integrated microphone and cable controls, it can also handle phone calls or activate the microphone for gaming.