Mobile phone fixing: elastic clip, good stability, adjustable width 50-80MM, suitable for most 4-6.3 inch mobile phonesHigh-brightness headlights: Double lamp bead lighting design to ensure safe driving at night, 400 lumen130dB speaker: sound up to 130dB, effectively warning pedestrians and vehicles, you can ask for help in case of danger, say goodbye to crying, 5 sound effects, long press 4 seconds to switchCan be used as a charging treasure: built-in 4000 mAh large-capacity battery, you can charge if you want to charge, convenient and fast, long battery life, suitable for various USB chargingSealed and waterproof: make sure you don?t have to worry about rain on rainy days, you can still use it