5.56 x 4.09 x 1.6 inches

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🎶Safety & Enjoyment: Truefree F1 air-conduction Bluetooth headphones are designed for sports. The open-ear design ensures you enjoy your favorite audio during workouts while staying aware of your surroundings for ultimate safety, compared to traditional in-ear or over-ear sports headphones.
🎧Bud-free Comfort & Secure Fit: Our wireless headset features an ultra-light open-ear design and a skin-friendly wraparound frame, providing all-day bud-free comfort and a secure fit from a light jog to an intense workout.