The FiiO FF1 earphones are not a traditional in-ear design, but rather earbuds. Earbuds sit in the outer ear rather than being inserted into the ear canal, which many music lovers find significantly more comfortable. Particularly when lying on the side, earbuds do not cause discomfort. Weighing only 3.2 grams per earphone, the FiiO FF1 is also exceptionally lightweight. A common drawback of earbuds is often their weaker bass response. To achieve 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, powerful driver has a generous diameter of 14.2 mm and produces a vibrant, 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 on both earphones. The 3.5 mm plug is compatible with many portable music devices, and to use the FF1 with smartphones that lack 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.