Multifunction: LED flashlight; bluetooth speaker, bluetooth hands-free call; mobile power; FM radio, tactical flashlight. Bright lighting-LED energy saving bulbs, long life, night lighting, such as bicycle headlights, support SOS distress signal , required. Built-in battery capacity: 1000 mA-1200 mA (battery not included) Frequency response range: 120HZ-20KHZ Output power: 5W * 2 Signal to noise ratio: ≥90dB Effective distance: 10 meters Appearance size: 237 * 131 * 95MM Package includes: 1 * bluetooth speaker (green, not waterproof) Pay attention: Due of manual measurement, please allow slight dimensional tolerances Lighting in photography may cause chromatic aberration compared to real life