1. Stable and practical: the top of this bike light features an elastic clip, good stability, and it is adjustable from 50-80mm/1.97-3.15inch (approximately) in width, suitable for mobile phone of 4-6.3 inches.2. Cycling Bike Light: Bright front lights, ideal for night cycling, double lamp bead lighting design, to ensure your safe riding at night.There are 3 modes of strong light, bright light and flashing light, which can easily activate the phone mode for daily operating needs.3. Powerful horn function: 5 kinds of horn sound effects, 130 decibel horn, farewell cry, up to 130 decibel sounds, effectively warning passers-by and vehicles.4. High Capacity Battery: Perfect for mobile charging, convenient and fast, built-in 4000mAh high capacity battery 4000mah makes it easy to charge anytime, anywhere.5. Specifications: Name: Multifunctional mobile phone holder Material: ABS Size: about 50mm*130mm/1.97-5.12inch Clamping range: 50-80mm (4-6.3 inch mobile phone) Charging type: Two-way USB chargingBattery capacity: 2000/4000 mah Output voltage/current: 0.8A Front light: 200/400 lumens Lamp beads Type: LED lamp beads*3 Lighting: strong light, low light, flashing Speaker Decibel: 130decibels Sound mode: 5 sound modes Life time: 8-10 hours Packing list: Multifunctional phone holder*1