B-Race Stone 1 LED front light, 6 functions, with a maximum power of 100 lumens and rechargeable battery with Type-C USB cable. Six operating modes: 100% brightness - 50% brightness - 25% brightness - 2 Flash mode - off. Misures: 88x36x24 mm, weight 50 g., Charging time: 2.5-3 hours, Waterprof level: IPX4. Suitable for dumbbells from 22 to 31.8 mm. Battery charger indicator in the ignition/shutdown button. The lateral openings of the lens allow you to have a more extensive brightness.